diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index a64b6918c499..50263b7ff7f0 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -231,3 +231,8 @@
 
 # Cinnamon
 /pkgs/desktops/cinnamon @mkg20001
+
+#nim
+/pkgs/development/compilers/nim  @ehmry
+/pkgs/development/nim-packages  @ehmry
+/pkgs/top-level/nim-packages.nix  @ehmry
diff --git a/.github/labeler.yml b/.github/labeler.yml
index ff831042461c..780843a2a553 100644
--- a/.github/labeler.yml
+++ b/.github/labeler.yml
@@ -72,6 +72,12 @@
   - nixos/**/*
   - pkgs/os-specific/linux/nixos-rebuild/**/*
 
+"6.topic: nim":
+  - doc/languages-frameworks/nim.section.md
+  - pkgs/development/compilers/nim/*
+  - pkgs/development/nim-packages/**/*
+  - pkgs/top-level/nim-packages.nix
+
 "6.topic: ocaml":
   - doc/languages-frameworks/ocaml.section.md
   - pkgs/development/compilers/ocaml/**/*
diff --git a/doc/languages-frameworks/index.xml b/doc/languages-frameworks/index.xml
index 29a1e089692f..b010f27cac02 100644
--- a/doc/languages-frameworks/index.xml
+++ b/doc/languages-frameworks/index.xml
@@ -23,6 +23,7 @@
  <xi:include href="javascript.section.xml" />
  <xi:include href="lua.section.xml" />
  <xi:include href="maven.section.xml" />
+ <xi:include href="nim.section.xml" />
  <xi:include href="ocaml.section.xml" />
  <xi:include href="octave.section.xml" />
  <xi:include href="perl.section.xml" />
diff --git a/doc/languages-frameworks/nim.section.md b/doc/languages-frameworks/nim.section.md
new file mode 100644
index 000000000000..16dce61d71c9
--- /dev/null
+++ b/doc/languages-frameworks/nim.section.md
@@ -0,0 +1,91 @@
+# Nim {#nim}
+
+## Overview {#nim-overview}
+
+The Nim compiler, a builder function, and some packaged libraries are available
+in Nixpkgs. Until now each compiler release has been effectively backwards
+compatible so only the latest version is available.
+
+## Nim program packages in Nixpkgs {#nim-program-packages-in-nixpkgs}
+
+Nim programs can be built using `nimPackages.buildNimPackage`. In the
+case of packages not containing exported library code the attribute
+`nimBinOnly` should be set to `true`.
+
+The following example shows a Nim program that depends only on Nim libraries:
+
+```nix
+{ lib, nimPackages, fetchurl }:
+
+nimPackages.buildNimPackage rec {
+  pname = "hottext";
+  version = "1.4";
+
+  nimBinOnly = true;
+
+  src = fetchurl {
+    url = "https://git.sr.ht/~ehmry/hottext/archive/v${version}.tar.gz";
+    sha256 = "sha256-hIUofi81zowSMbt1lUsxCnVzfJGN3FEiTtN8CEFpwzY=";
+  };
+
+  buildInputs = with nimPackages; [
+    bumpy
+    chroma
+    flatty
+    nimsimd
+    pixie
+    sdl2
+    typography
+    vmath
+    zippy
+  ];
+}
+
+```
+
+## Nim library packages in Nixpkgs {#nim-library-packages-in-nixpkgs}
+
+
+Nim libraries can also be built using `nimPackages.buildNimPackage`, but
+often the product of a fetcher is sufficient to satisfy a dependency.
+The `fetchgit`, `fetchFromGitHub`, and `fetchNimble` functions yield an
+output that can be discovered during the `configurePhase` of `buildNimPackage`.
+
+Nim library packages are listed in
+[pkgs/top-level/nim-packages.nix](https://github.com/NixOS/nixpkgs/blob/master/pkgs/top-level/nim-packages.nix) and implemented at
+[pkgs/development/nim-packages](https://github.com/NixOS/nixpkgs/tree/master/pkgs/development/nim-packages).
+
+The following example shows a Nim library that propagates a dependency on a
+non-Nim package:
+```nix
+{ lib, buildNimPackage, fetchNimble, SDL2 }:
+
+buildNimPackage rec {
+  pname = "sdl2";
+  version = "2.0.4";
+  src = fetchNimble {
+    inherit pname version;
+    hash = "sha256-Vtcj8goI4zZPQs2TbFoBFlcR5UqDtOldaXSH/+/xULk=";
+  };
+  propagatedBuildInputs = [ SDL2 ];
+}
+```
+
+## `buildNimPackage` parameters {#buildnimpackage-parameters}
+
+All parameters from `stdenv.mkDerivation` function are still supported. The
+following are specific to `buildNimPackage`:
+
+* `nimBinOnly ? false`: If `true` then build only the programs listed in
+  the Nimble file in the packages sources.
+* `nimbleFile`: Specify the Nimble file location of the package being built
+  rather than discover the file at build-time.
+* `nimRelease ? true`: Build the package in *release* mode.
+* `nimDefines ? []`: A list of Nim defines. Key-value tuples are not supported.
+* `nimFlags ? []`: A list of command line arguments to pass to the Nim compiler.
+  Use this to specify defines with arguments in the form of `-d:${name}=${value}`.
+* `nimDoc` ? false`: Build and install HTML documentation.
+
+* `buildInputs` ? []: The packages listed here will be searched for `*.nimble`
+  files which are used to populate the Nim library path. Otherwise the standard
+  behavior is in effect.
diff --git a/pkgs/applications/science/biology/mosdepth/default.nix b/pkgs/applications/science/biology/mosdepth/default.nix
index 715f2ea313b4..b6cc5e406153 100644
--- a/pkgs/applications/science/biology/mosdepth/default.nix
+++ b/pkgs/applications/science/biology/mosdepth/default.nix
@@ -1,23 +1,9 @@
-{lib, stdenv, fetchFromGitHub, nim, htslib, pcre}:
+{lib, nimPackages, fetchFromGitHub, pcre}:
 
-let
-  hts-nim = fetchFromGitHub {
-    owner = "brentp";
-    repo = "hts-nim";
-    rev = "v0.3.4";
-    sha256 = "0670phk1bq3l9j2zaa8i5wcpc5dyfrc0l2a6c21g0l2mmdczffa7";
-  };
-
-  docopt = fetchFromGitHub {
-    owner = "docopt";
-    repo = "docopt.nim";
-    rev = "v0.6.7";
-    sha256 = "1ga7ckg21fzwwvh26jp2phn2h3pvkn8g8sm13dxif33rp471bv37";
-  };
-
-in stdenv.mkDerivation rec {
+nimPackages.buildNimPackage rec {
   pname = "mosdepth";
   version = "0.3.2";
+  nimBinOnly = true;
 
   src = fetchFromGitHub {
     owner = "brentp";
@@ -26,15 +12,7 @@ in stdenv.mkDerivation rec {
     sha256 = "sha256-uui4yC7ok+pvbXVKfBVsAarH40fnH4fnP8P4uzOqztQ=";
   };
 
-  nativeBuildInputs = [ nim ];
-  buildInputs = [ htslib pcre ];
-
-  buildPhase = ''
-    HOME=$TMPDIR
-    nim -p:${hts-nim}/src -p:${docopt}/src c --nilseqs:on -d:release mosdepth.nim
-  '';
-
-  installPhase = "install -Dt $out/bin mosdepth";
+  buildInputs = with nimPackages; [ docopt hts-nim pcre ];
 
   meta = with lib; {
     description = "fast BAM/CRAM depth calculation for WGS, exome, or targeted sequencing";
diff --git a/pkgs/applications/terminal-emulators/nimmm/default.nix b/pkgs/applications/terminal-emulators/nimmm/default.nix
index bb09fa776b62..0e0d75ab8012 100644
--- a/pkgs/applications/terminal-emulators/nimmm/default.nix
+++ b/pkgs/applications/terminal-emulators/nimmm/default.nix
@@ -1,30 +1,9 @@
-{ lib, stdenv, fetchFromGitHub, nim, termbox, pcre }:
+{ lib, nimPackages, fetchFromGitHub, nim, termbox, pcre }:
 
-let
-  noise = fetchFromGitHub {
-    owner = "jangko";
-    repo = "nim-noise";
-    rev = "v0.1.14";
-    sha256 = "0wndiphznfyb1pac6zysi3bqljwlfwj6ziarcwnpf00sw2zni449";
-  };
-
-  nimbox = fetchFromGitHub {
-    owner = "dom96";
-    repo = "nimbox";
-    rev = "6a56e76c01481176f16ae29b7d7c526bd83f229b";
-    sha256 = "15x1sdfxa1xcqnr68705jfnlv83lm0xnp2z9iz3pgc4bz5vwn4x1";
-  };
-
-  lscolors = fetchFromGitHub {
-    owner = "joachimschmidt557";
-    repo = "nim-lscolors";
-    rev = "v0.3.3";
-    sha256 = "0526hqh46lcfsvymb67ldsc8xbfn24vicn3b8wrqnh6mag8wynf4";
-  };
-
-in stdenv.mkDerivation rec {
+nimPackages.buildNimPackage rec {
   pname = "nimmm";
   version = "0.2.0";
+  nimBinOnly = true;
 
   src = fetchFromGitHub {
     owner = "joachimschmidt557";
@@ -33,17 +12,8 @@ in stdenv.mkDerivation rec {
     sha256 = "168n61avphbxsxfq8qzcnlqx6wgvz5yrjvs14g25cg3k46hj4xqg";
   };
 
-  nativeBuildInputs = [ nim ];
-  buildInputs = [ termbox pcre ];
-
-  buildPhase = ''
-    export HOME=$TMPDIR;
-    nim -p:${noise} -p:${nimbox} -p:${lscolors}/src c -d:release src/nimmm.nim
-  '';
-
-  installPhase = ''
-    install -Dt $out/bin src/nimmm
-  '';
+  buildInputs = [ termbox pcre ]
+    ++ (with nimPackages; [ noise nimbox lscolors ]);
 
   meta = with lib; {
     description = "Terminal file manager written in nim";
diff --git a/pkgs/development/compilers/nim/default.nix b/pkgs/development/compilers/nim/default.nix
index 49e18097ab9a..7434347f2a28 100644
--- a/pkgs/development/compilers/nim/default.nix
+++ b/pkgs/development/compilers/nim/default.nix
@@ -1,8 +1,9 @@
 # https://nim-lang.github.io/Nim/packaging.html
 # https://nim-lang.org/docs/nimc.html
 
-{ lib, buildPackages, stdenv, fetchurl, fetchgit, fetchFromGitHub, makeWrapper
-, openssl, pcre, readline, boehmgc, sqlite, nim-unwrapped }:
+{ lib, callPackage, buildPackages, stdenv, fetchurl, fetchgit, fetchFromGitHub
+, makeWrapper, openssl, pcre, readline, boehmgc, sqlite, nim-unwrapped
+, nimble-unwrapped }:
 
 let
   parseCpu = platform:
@@ -186,138 +187,141 @@ in {
     nim' = buildPackages.nim-unwrapped;
     nimble' = buildPackages.nimble-unwrapped;
     inherit (stdenv) targetPlatform;
-  in stdenv.mkDerivation {
-    name = "${targetPlatform.config}-nim-wrapper-${nim'.version}";
-    inherit (nim') version;
-    preferLocalBuild = true;
-    strictDeps = true;
+    self = stdenv.mkDerivation {
+      name = "${targetPlatform.config}-nim-wrapper-${nim'.version}";
+      inherit (nim') version;
+      preferLocalBuild = true;
+      strictDeps = true;
 
-    nativeBuildInputs = [ makeWrapper ];
+      nativeBuildInputs = [ makeWrapper ];
 
-    patches = [
-      ./nim.cfg.patch
-      # Remove configurations that clash with ours
-    ];
+      patches = [
+        ./nim.cfg.patch
+        # Remove configurations that clash with ours
+      ];
 
-    unpackPhase = ''
-      runHook preUnpack
-      tar xf ${nim'.src} nim-$version/config
-      cd nim-$version
-      runHook postUnpack
-    '';
-
-    dontConfigure = true;
-
-    buildPhase =
-      # Configure the Nim compiler to use $CC and $CXX as backends
-      # The compiler is configured by two configuration files, each with
-      # a different DSL. The order of evaluation matters and that order
-      # is not documented, so duplicate the configuration across both files.
-      ''
-        runHook preBuild
-        cat >> config/config.nims << WTF
-
-        switch("os", "${nimTarget.os}")
-        switch("cpu", "${nimTarget.cpu}")
-        switch("define", "nixbuild")
-
-        # Configure the compiler using the $CC set by Nix at build time
-        import strutils
-        let cc = getEnv"CC"
-        if cc.contains("gcc"):
-          switch("cc", "gcc")
-        elif cc.contains("clang"):
-          switch("cc", "clang")
-        WTF
-
-        mv config/nim.cfg config/nim.cfg.old
-        cat > config/nim.cfg << WTF
-        os = "${nimTarget.os}"
-        cpu =  "${nimTarget.cpu}"
-        define:"nixbuild"
-        WTF
-
-        cat >> config/nim.cfg < config/nim.cfg.old
-        rm config/nim.cfg.old
-
-        cat >> config/nim.cfg << WTF
-
-        clang.cpp.exe %= "\$CXX"
-        clang.cpp.linkerexe %= "\$CXX"
-        clang.exe %= "\$CC"
-        clang.linkerexe %= "\$CC"
-        gcc.cpp.exe %= "\$CXX"
-        gcc.cpp.linkerexe %= "\$CXX"
-        gcc.exe %= "\$CC"
-        gcc.linkerexe %= "\$CC"
-        WTF
-
-        runHook postBuild
+      unpackPhase = ''
+        runHook preUnpack
+        tar xf ${nim'.src} nim-$version/config
+        cd nim-$version
+        runHook postUnpack
       '';
 
-    wrapperArgs = [
-      "--prefix PATH : ${lib.makeBinPath [ buildPackages.gdb ]}:${
-        placeholder "out"
-      }/bin"
-      # Used by nim-gdb
+      dontConfigure = true;
 
-      "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ openssl pcre ]}"
-      # These libraries may be referred to by the standard library.
-      # This is broken for cross-compilation because the package
-      # set will be shifted back by nativeBuildInputs.
+      buildPhase =
+        # Configure the Nim compiler to use $CC and $CXX as backends
+        # The compiler is configured by two configuration files, each with
+        # a different DSL. The order of evaluation matters and that order
+        # is not documented, so duplicate the configuration across both files.
+        ''
+          runHook preBuild
+          cat >> config/config.nims << WTF
 
-      "--set NIM_CONFIG_PATH ${placeholder "out"}/etc/nim"
-      # Use the custom configuration
+          switch("os", "${nimTarget.os}")
+          switch("cpu", "${nimTarget.cpu}")
+          switch("define", "nixbuild")
 
-      ''--set NIX_HARDENING_ENABLE "''${NIX_HARDENING_ENABLE/fortify}"''
-      # Fortify hardening appends -O2 to gcc flags which is unwanted for unoptimized nim builds.
-    ];
+          # Configure the compiler using the $CC set by Nix at build time
+          import strutils
+          let cc = getEnv"CC"
+          if cc.contains("gcc"):
+            switch("cc", "gcc")
+          elif cc.contains("clang"):
+            switch("cc", "clang")
+          WTF
 
-    installPhase = ''
-      runHook preInstall
+          mv config/nim.cfg config/nim.cfg.old
+          cat > config/nim.cfg << WTF
+          os = "${nimTarget.os}"
+          cpu =  "${nimTarget.cpu}"
+          define:"nixbuild"
+          WTF
 
-      mkdir -p $out/bin $out/etc
+          cat >> config/nim.cfg < config/nim.cfg.old
+          rm config/nim.cfg.old
 
-      cp -r config $out/etc/nim
+          cat >> config/nim.cfg << WTF
+
+          clang.cpp.exe %= "\$CXX"
+          clang.cpp.linkerexe %= "\$CXX"
+          clang.exe %= "\$CC"
+          clang.linkerexe %= "\$CC"
+          gcc.cpp.exe %= "\$CXX"
+          gcc.cpp.linkerexe %= "\$CXX"
+          gcc.exe %= "\$CC"
+          gcc.linkerexe %= "\$CC"
+          WTF
+
+          runHook postBuild
+        '';
+
+      wrapperArgs = [
+        "--prefix PATH : ${lib.makeBinPath [ buildPackages.gdb ]}:${
+          placeholder "out"
+        }/bin"
+        # Used by nim-gdb
+
+        "--prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath [ openssl pcre ]}"
+        # These libraries may be referred to by the standard library.
+        # This is broken for cross-compilation because the package
+        # set will be shifted back by nativeBuildInputs.
+
+        "--set NIM_CONFIG_PATH ${placeholder "out"}/etc/nim"
+        # Use the custom configuration
+
+        ''--set NIX_HARDENING_ENABLE "''${NIX_HARDENING_ENABLE/fortify}"''
+        # Fortify hardening appends -O2 to gcc flags which is unwanted for unoptimized nim builds.
+      ];
+
+      installPhase = ''
+        runHook preInstall
+
+        mkdir -p $out/bin $out/etc
+
+        cp -r config $out/etc/nim
+
+        for binpath in ${nim'}/bin/nim?*; do
+          local binname=`basename $binpath`
+          makeWrapper \
+            $binpath $out/bin/${targetPlatform.config}-$binname \
+            $wrapperArgs
+          ln -s $out/bin/${targetPlatform.config}-$binname $out/bin/$binname
+        done
 
-      for binpath in ${nim'}/bin/nim?*; do
-        local binname=`basename $binpath`
         makeWrapper \
-          $binpath $out/bin/${targetPlatform.config}-$binname \
+          ${nim'}/nim/bin/nim $out/bin/${targetPlatform.config}-nim \
+          --set-default CC $(command -v $CC) \
+          --set-default CXX $(command -v $CXX) \
           $wrapperArgs
-        ln -s $out/bin/${targetPlatform.config}-$binname $out/bin/$binname
-      done
+        ln -s $out/bin/${targetPlatform.config}-nim $out/bin/nim
 
-      makeWrapper \
-        ${nim'}/nim/bin/nim $out/bin/${targetPlatform.config}-nim \
-        --set-default CC $(command -v $CC) \
-        --set-default CXX $(command -v $CXX) \
-        $wrapperArgs
-      ln -s $out/bin/${targetPlatform.config}-nim $out/bin/nim
+        makeWrapper \
+          ${nim'}/bin/testament $out/bin/${targetPlatform.config}-testament \
+          $wrapperArgs
+        ln -s $out/bin/${targetPlatform.config}-testament $out/bin/testament
 
-      makeWrapper \
-        ${nim'}/bin/testament $out/bin/${targetPlatform.config}-testament \
-        $wrapperArgs
-      ln -s $out/bin/${targetPlatform.config}-testament $out/bin/testament
+        makeWrapper \
+          ${nimble'}/bin/nimble $out/bin/${targetPlatform.config}-nimble \
+          --suffix PATH : $out/bin
+        ln -s $out/bin/${targetPlatform.config}-nimble $out/bin/nimble
 
-      makeWrapper \
-        ${nimble'}/bin/nimble $out/bin/${targetPlatform.config}-nimble \
-        --suffix PATH : $out/bin
-      ln -s $out/bin/${targetPlatform.config}-nimble $out/bin/nimble
+        runHook postInstall
+      '';
 
-      runHook postInstall
-    '';
+      passthru = {
+        nim = nim';
+        nimble = nimble';
+      };
 
-    passthru = {
-      nim = nim';
-      nimble = nimble';
-    };
-
-    meta = nim'.meta // {
-      description = nim'.meta.description
-        + " (${targetPlatform.config} wrapper)";
-      platforms = with lib.platforms; unix ++ genode;
+      meta = nim'.meta // {
+        description = nim'.meta.description
+          + " (${targetPlatform.config} wrapper)";
+        platforms = with lib.platforms; unix ++ genode;
+      };
     };
+  in self // {
+    pkgs = callPackage ../../../top-level/nim-packages.nix { nim = self; };
   };
 
 }
diff --git a/pkgs/development/nim-packages/astpatternmatching/default.nix b/pkgs/development/nim-packages/astpatternmatching/default.nix
new file mode 100644
index 000000000000..6f1137ac7045
--- /dev/null
+++ b/pkgs/development/nim-packages/astpatternmatching/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "krux02";
+  repo = "ast-pattern-matching";
+  rev = "87f7d163421af5a4f5e5cb6da7b93278e6897e96";
+  sha256 = "19mb5bb6riia8380p5dpc3q0vwgrj958dd6p7vw8vkvwiqrzg6zq";
+}
diff --git a/pkgs/development/nim-packages/build-nim-package/default.nix b/pkgs/development/nim-packages/build-nim-package/default.nix
new file mode 100644
index 000000000000..6c7aafd22c81
--- /dev/null
+++ b/pkgs/development/nim-packages/build-nim-package/default.nix
@@ -0,0 +1,43 @@
+{ lib, stdenv, nim, nim_builder }:
+
+{ strictDeps ? true, nativeBuildInputs ? [ ], configurePhase ? null
+, buildPhase ? null, checkPhase ? null, installPhase ? null, meta ? { }, ...
+}@attrs:
+
+stdenv.mkDerivation (attrs // {
+  inherit strictDeps;
+  nativeBuildInputs = [ nim nim_builder ] ++ nativeBuildInputs;
+
+  configurePhase = if isNull configurePhase then ''
+    runHook preConfigure
+    find $NIX_BUILD_TOP -name .attrs.json
+    nim_builder --phase:configure
+    runHook postConfigure
+  '' else
+    buildPhase;
+
+  buildPhase = if isNull buildPhase then ''
+    runHook preBuild
+    nim_builder --phase:build
+    runHook postBuild
+  '' else
+    buildPhase;
+
+  checkPhase = if isNull checkPhase then ''
+    runHook preCheck
+    nim_builder --phase:check
+    runHook postCheck
+  '' else
+    checkPhase;
+
+  installPhase = if isNull installPhase then ''
+    runHook preInstall
+    nim_builder --phase:install
+    runHook postInstall
+  '' else
+    installPhase;
+
+  meta = meta // {
+    maintainers = (meta.maintainers or [ ]) ++ [ lib.maintainers.ehmry ];
+  };
+})
diff --git a/pkgs/development/nim-packages/bumpy/default.nix b/pkgs/development/nim-packages/bumpy/default.nix
new file mode 100644
index 000000000000..9579d87d9d5d
--- /dev/null
+++ b/pkgs/development/nim-packages/bumpy/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "bumpy";
+  version = "1.0.3";
+  hash = "sha256-mDmDlhOGoYYjKgF5j808oT2NqRlfcOdLSDE3WtdJFQ0=";
+}
diff --git a/pkgs/development/nim-packages/c2nim/default.nix b/pkgs/development/nim-packages/c2nim/default.nix
new file mode 100644
index 000000000000..408e4fbee96e
--- /dev/null
+++ b/pkgs/development/nim-packages/c2nim/default.nix
@@ -0,0 +1,19 @@
+{ lib, buildNimPackage, fetchFromGitHub, SDL2 }:
+
+buildNimPackage rec {
+  pname = "c2nim";
+  version = "0.9.18";
+  nimBinOnly = true;
+  src = fetchFromGitHub {
+    owner = "nim-lang";
+    repo = pname;
+    rev = version;
+    hash = "sha256-127ux36mfC+PnS2HIQffw+z0TSvzdQXnKRxqYV3XahU=";
+  };
+  meta = with lib;
+    src.meta // {
+      description = "Tool to translate Ansi C code to Nim";
+      license = licenses.mit;
+      maintainers = [ maintainers.ehmry ];
+    };
+}
diff --git a/pkgs/development/nim-packages/chroma/default.nix b/pkgs/development/nim-packages/chroma/default.nix
new file mode 100644
index 000000000000..266cd0645f36
--- /dev/null
+++ b/pkgs/development/nim-packages/chroma/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "chroma";
+  version = "0.2.5";
+  hash = "sha256-6lNHpO2aMorgkaPfo6kRcOs9r5R6T/kislVmkeoulw8=";
+}
diff --git a/pkgs/development/nim-packages/docopt/default.nix b/pkgs/development/nim-packages/docopt/default.nix
new file mode 100644
index 000000000000..38465384fbde
--- /dev/null
+++ b/pkgs/development/nim-packages/docopt/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "docopt";
+  repo = "docopt.nim";
+  rev = "v0.6.7";
+  sha256 = "1ga7ckg21fzwwvh26jp2phn2h3pvkn8g8sm13dxif33rp471bv37";
+}
diff --git a/pkgs/development/nim-packages/fetch-nimble/builder.sh b/pkgs/development/nim-packages/fetch-nimble/builder.sh
new file mode 100644
index 000000000000..693ab339408e
--- /dev/null
+++ b/pkgs/development/nim-packages/fetch-nimble/builder.sh
@@ -0,0 +1,12 @@
+source $stdenv/setup
+export HOME=$NIX_BUILD_TOP
+
+nimble --accept --noSSLCheck develop "${pkgname}@${version}"
+# TODO: bring in the certificates for Nimble to verify the fetch of
+# the package list.
+
+pkgdir=${NIX_BUILD_TOP}/${pkgname}
+
+find "$pkgdir" -name .git -print0 | xargs -0 rm -rf
+
+cp -a "$pkgdir" "$out"
diff --git a/pkgs/development/nim-packages/fetch-nimble/default.nix b/pkgs/development/nim-packages/fetch-nimble/default.nix
new file mode 100644
index 000000000000..ccdacc8e27b9
--- /dev/null
+++ b/pkgs/development/nim-packages/fetch-nimble/default.nix
@@ -0,0 +1,20 @@
+{ lib, makeOverridable, stdenv, gitMinimal, nim, cacert }:
+
+makeOverridable (
+
+  { pname, version, hash ? lib.fakeHash,
+
+  meta ? { }, passthru ? { }, preferLocalBuild ? true }:
+  stdenv.mkDerivation {
+    inherit version meta passthru preferLocalBuild;
+    pname = pname + "-src";
+    pkgname = pname;
+    builder = ./builder.sh;
+    nativeBuildInputs = [ gitMinimal nim ];
+    outputHash = hash;
+    outputHashAlgo = null;
+    outputHashMode = "recursive";
+    impureEnvVars = lib.fetchers.proxyImpureEnvVars
+      ++ [ "GIT_PROXY_COMMAND" "SOCKS_SERVER" ];
+    GIT_SSL_CAINFO = "${cacert}/etc/ssl/certs/ca-bundle.crt";
+  })
diff --git a/pkgs/development/nim-packages/flatty/default.nix b/pkgs/development/nim-packages/flatty/default.nix
new file mode 100644
index 000000000000..241b59f8230f
--- /dev/null
+++ b/pkgs/development/nim-packages/flatty/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "flatty";
+  version = "0.2.1";
+  hash = "sha256-TqNnRh2+i6n98ktLRVQxt9CVw17FGLNYq29rJoMus/0=";
+}
diff --git a/pkgs/development/nim-packages/frosty/default.nix b/pkgs/development/nim-packages/frosty/default.nix
new file mode 100644
index 000000000000..6394c455d07f
--- /dev/null
+++ b/pkgs/development/nim-packages/frosty/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "disruptek";
+  repo = "frosty";
+  rev = "0.3.1";
+  sha256 = "0hd6484ihjgl57gmqyp5xfq5prycb49k0313fqky600mhz71nmyz";
+}
diff --git a/pkgs/development/nim-packages/hts-nim/default.nix b/pkgs/development/nim-packages/hts-nim/default.nix
new file mode 100644
index 000000000000..960a9e63d215
--- /dev/null
+++ b/pkgs/development/nim-packages/hts-nim/default.nix
@@ -0,0 +1,13 @@
+{ buildNimPackage, fetchFromGitHub, htslib }:
+
+buildNimPackage rec {
+  pname = "hts-nim";
+  version = "0.3.4";
+  src = fetchFromGitHub {
+    owner = "brentp";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "0670phk1bq3l9j2zaa8i5wcpc5dyfrc0l2a6c21g0l2mmdczffa7";
+  };
+  propagatedBuildInputs = [ htslib ];
+}
diff --git a/pkgs/development/nim-packages/jester/default.nix b/pkgs/development/nim-packages/jester/default.nix
new file mode 100644
index 000000000000..21646f3667f0
--- /dev/null
+++ b/pkgs/development/nim-packages/jester/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "dom96";
+  repo = "jester";
+  rev = "v0.5.0";
+  sha256 = "0m8a4ss4460jd2lcbqcbdd68jhcy35xg7qdyr95mh8rflwvmcvhk";
+}
diff --git a/pkgs/development/nim-packages/jsonschema/default.nix b/pkgs/development/nim-packages/jsonschema/default.nix
new file mode 100644
index 000000000000..8dc195b8b822
--- /dev/null
+++ b/pkgs/development/nim-packages/jsonschema/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "PMunch";
+  repo = "jsonschema";
+  rev = "7b41c03e3e1a487d5a8f6b940ca8e764dc2cbabf";
+  sha256 = "1js64jqd854yjladxvnylij4rsz7212k31ks541pqrdzm6hpblbz";
+}
diff --git a/pkgs/development/nim-packages/karax/default.nix b/pkgs/development/nim-packages/karax/default.nix
new file mode 100644
index 000000000000..35a5c78ee56a
--- /dev/null
+++ b/pkgs/development/nim-packages/karax/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "karaxnim";
+  repo = "karax";
+  rev = "1.1.2";
+  sha256 = "07ykrd21hd76vlmkqpvv5xvaxw6aaq87bky47p2420ni85a6d94j";
+}
diff --git a/pkgs/development/nim-packages/lscolors/default.nix b/pkgs/development/nim-packages/lscolors/default.nix
new file mode 100644
index 000000000000..5a72c46e4c50
--- /dev/null
+++ b/pkgs/development/nim-packages/lscolors/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "joachimschmidt557";
+  repo = "nim-lscolors";
+  rev = "v0.3.3";
+  sha256 = "0526hqh46lcfsvymb67ldsc8xbfn24vicn3b8wrqnh6mag8wynf4";
+}
diff --git a/pkgs/development/nim-packages/markdown/default.nix b/pkgs/development/nim-packages/markdown/default.nix
new file mode 100644
index 000000000000..c893ff0e4148
--- /dev/null
+++ b/pkgs/development/nim-packages/markdown/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "soasme";
+  repo = "nim-markdown";
+  rev = "abdbe5e";
+  sha256 = "0f3c1sxvhbbds43c9l8cz69pfpf984msj1lv4pb7bzpxb5zil2wy";
+}
diff --git a/pkgs/development/nim-packages/nim_builder/default.nix b/pkgs/development/nim-packages/nim_builder/default.nix
new file mode 100644
index 000000000000..34da4dfa61a0
--- /dev/null
+++ b/pkgs/development/nim-packages/nim_builder/default.nix
@@ -0,0 +1,19 @@
+{ lib, stdenv, nim }:
+
+stdenv.mkDerivation {
+  pname = "nim_builder";
+  inherit (nim) version;
+  dontUnpack = true;
+  nativeBuildInputs = [ nim ];
+  buildPhase = ''
+    cp ${./nim_builder.nim} nim_builder.nim
+    nim c --nimcache:$TMPDIR nim_builder
+  '';
+  installPhase = ''
+    install -Dt $out/bin nim_builder
+  '';
+  meta = {
+    description = "Internal Nixpkgs utility for buildNimPackage.";
+    maintainers = [ lib.maintainers.ehmry ];
+  };
+}
diff --git a/pkgs/development/nim-packages/nim_builder/nim_builder.nim b/pkgs/development/nim-packages/nim_builder/nim_builder.nim
new file mode 100644
index 000000000000..b8881b700047
--- /dev/null
+++ b/pkgs/development/nim-packages/nim_builder/nim_builder.nim
@@ -0,0 +1,166 @@
+# SPDX-FileCopyrightText: 2021 Nixpkgs/NixOS contributors
+## Custom Nim builder for Nixpkgs.
+
+import std/[os, osproc, parseutils, sequtils, streams, strutils]
+
+proc findNimbleFile(): string =
+  ## Copied from Nimble.
+  ## Copyright (c) 2015, Dominik Picheta
+  ## BSD3
+  let dir = getCurrentDir()
+  result = ""
+  var hits = 0
+  for kind, path in walkDir(dir):
+    if kind in {pcFile, pcLinkToFile}:
+      let ext = path.splitFile.ext
+      if ext == ".nimble":
+        result = path
+        inc hits
+  if hits >= 2:
+    quit("Only one .nimble file should be present in " & dir)
+  elif hits == 0:
+    quit("Could not find a file with a .nimble extension in " & dir)
+
+proc getEnvBool(key: string; default = false): bool =
+  ## Parse a boolean environmental variable.
+  let val = getEnv(key)
+  if val == "": default
+  else: parseBool(val)
+
+proc getNimbleFilePath(): string =
+  ## Get the Nimble file for the current package.
+  if existsEnv"nimbleFile":
+    getEnv"nimbleFile"
+  else:
+    findNimbleFile()
+
+proc getNimbleValue(filePath, key: string; default = ""): string =
+  ## Extract a string value from the Nimble file at ``filePath``.
+  var
+    fs = newFileStream(filePath, fmRead)
+    line: string
+  if fs.isNil:
+    quit("could not open " & filePath)
+  while fs.readline(line):
+    if line.startsWith(key):
+      var i = key.len
+      i.inc skipWhile(line, Whitespace, i)
+      if line[i] == '=':
+        inc i
+        i.inc skipWhile(line, Whitespace, i)
+        discard parseUntil(line, result, Newlines, i)
+        if result.len > 0 and result[0] == '"':
+          result = result.unescape
+        return
+  default
+
+proc getNimbleValues(filePath, key: string): seq[string] =
+  ## Extract a string sequence from the Nimble file at ``filePath``.
+  var gunk = getNimbleValue(filePath, key)
+  result = gunk.strip(chars = {'@', '[', ']'}).split(',')
+  if result == @[""]: reset result
+  apply(result) do (s: var string):
+    s = s.strip()
+    if s.len > 0 and s[0] == '"':
+      s = s.unescape()
+
+proc configurePhase*() =
+  ## Generate "config.nims" which will be read by the Nim
+  ## compiler during later phases.
+  const configFilePath = "config.nims"
+  echo "generating ", configFilePath
+  let
+    nf = getNimbleFilePath()
+    mode =
+      if fileExists configFilePath: fmAppend
+      else: fmWrite
+  var cfg = newFileStream(configFilePath, mode)
+  proc switch(key, val: string) =
+    cfg.writeLine("switch(", key.escape, ",", val.escape, ")")
+  switch("backend", nf.getNimbleValue("backend", "c"))
+  switch("nimcache", getEnv("NIX_BUILD_TOP", ".") / "nimcache")
+  if getEnvBool("nimRelease", true):
+    switch("define", "release")
+  for def in getEnv("nimDefines").split:
+    if def != "":
+      switch("define", def)
+  for input in getEnv("buildInputs").split:
+    if input != "":
+      for nimbleFile in walkFiles(input / "*.nimble"):
+        let inputSrc = normalizedPath(
+            input / nimbleFile.getNimbleValue("srcDir", "."))
+        echo "found nimble input ", inputSrc
+        switch("path", inputSrc)
+  close(cfg)
+
+proc buildPhase*() =
+  ## Build the programs listed in the Nimble file and
+  ## optionally some documentation.
+  var cmds: seq[string]
+  proc before(idx: int) =
+    echo "build job ", idx, ": ", cmds[idx]
+  let
+    nf = getNimbleFilePath()
+    bins = nf.getNimbleValues("bin")
+    srcDir = nf.getNimbleValue("srcDir", ".")
+    binDir = getenv("outputBin", getenv("out", "/dev/null")) / "bin"
+  if bins != @[]:
+    for bin in bins:
+      cmds.add("nim compile $# --outdir:$# $#" %
+          [getenv"nimFlags", binDir, normalizedPath(srcDir / bin)])
+  if getEnvBool"nimDoc":
+    echo "generating documentation"
+    let docDir = getenv("outputDoc", (getenv("out", "/dev/null") / "doc"))
+    for path in walkFiles(srcDir / "*.nim"):
+      cmds.add("nim doc --outdir:$# $#" % [docDir, path])
+  if cmds.len > 0:
+    let err = execProcesses(
+      cmds, n = 1,
+      beforeRunEvent = before)
+    if err != 0: quit("build phase failed", err)
+
+proc installPhase*() =
+  ## Install the Nim sources if ``nimBinOnly`` is not
+  ## set in the environment.
+  if not getEnvBool"nimBinOnly":
+    let
+      nf = getNimbleFilePath()
+      srcDir = nf.getNimbleValue("srcDir", ".")
+      devDir = getenv("outputDev", getenv("out", "/dev/null"))
+    echo "Install ", srcDir, " to ", devDir
+    copyDir(normalizedPath(srcDir), normalizedPath(devDir / srcDir))
+    copyFile(nf, devDir / nf.extractFilename)
+
+proc checkPhase*() =
+  ## Build and run the tests in ``tests``.
+  var cmds: seq[string]
+  proc before(idx: int) =
+    echo "check job ", idx, ": ", cmds[idx]
+  for path in walkPattern("tests/t*.nim"):
+    cmds.add("nim r $#" % [path])
+  let err = execProcesses(
+    cmds, n = 1,
+    beforeRunEvent = before)
+  if err != 0: quit("check phase failed", err)
+
+when isMainModule:
+  import std/parseopt
+  var phase: string
+
+  for kind, key, val in getopt():
+    case kind
+    of cmdLongOption:
+      case key.toLowerAscii
+      of "phase":
+        if phase != "": quit("only a single phase may be specified")
+        phase = val
+      else: quit("unhandled argument " & key)
+    of cmdEnd: discard
+    else: quit("unhandled argument " & key)
+
+  case phase
+  of "configure": configurePhase()
+  of "build": buildPhase()
+  of "install": installPhase()
+  of "check": checkPhase()
+  else: quit("unhandled phase " & phase)
diff --git a/pkgs/development/nim-packages/nimbox/default.nix b/pkgs/development/nim-packages/nimbox/default.nix
new file mode 100644
index 000000000000..53663c642810
--- /dev/null
+++ b/pkgs/development/nim-packages/nimbox/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "dom96";
+  repo = "nimbox";
+  rev = "6a56e76c01481176f16ae29b7d7c526bd83f229b";
+  sha256 = "15x1sdfxa1xcqnr68705jfnlv83lm0xnp2z9iz3pgc4bz5vwn4x1";
+}
diff --git a/pkgs/development/nim-packages/nimcrypto/default.nix b/pkgs/development/nim-packages/nimcrypto/default.nix
new file mode 100644
index 000000000000..6c212ef45f1a
--- /dev/null
+++ b/pkgs/development/nim-packages/nimcrypto/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "cheatfate";
+  repo = "nimcrypto";
+  rev = "a5742a9a214ac33f91615f3862c7b099aec43b00";
+  sha256 = "0al0jsaicm8vyr63n909dq1glhvpra1n9sllmj0r7lsjsdb59wsz";
+}
diff --git a/pkgs/development/nim-packages/nimsimd/default.nix b/pkgs/development/nim-packages/nimsimd/default.nix
new file mode 100644
index 000000000000..9ccd96453572
--- /dev/null
+++ b/pkgs/development/nim-packages/nimsimd/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "nimsimd";
+  version = "1.0.0";
+  hash = "sha256-kp61fylAJ6MSN9hLYLi7CU2lxVR/lbrNCvZTe0LJLGo=";
+}
diff --git a/pkgs/development/nim-packages/noise/default.nix b/pkgs/development/nim-packages/noise/default.nix
new file mode 100644
index 000000000000..7931467dbbd5
--- /dev/null
+++ b/pkgs/development/nim-packages/noise/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "jangko";
+  repo = "nim-noise";
+  rev = "v0.1.14";
+  sha256 = "0wndiphznfyb1pac6zysi3bqljwlfwj6ziarcwnpf00sw2zni449";
+}
diff --git a/pkgs/development/nim-packages/packedjson/default.nix b/pkgs/development/nim-packages/packedjson/default.nix
new file mode 100644
index 000000000000..9edad962d589
--- /dev/null
+++ b/pkgs/development/nim-packages/packedjson/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "Araq";
+  repo = "packedjson";
+  rev = "7198cc8";
+  sha256 = "1ay2zd88q8hvpvigsg8h0y5vc65hk3lk0d48fy9hwg4lcng19mp1";
+}
diff --git a/pkgs/development/nim-packages/pixie/default.nix b/pkgs/development/nim-packages/pixie/default.nix
new file mode 100644
index 000000000000..2262ccf23721
--- /dev/null
+++ b/pkgs/development/nim-packages/pixie/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "pixie";
+  version = "1.1.3";
+  hash = "sha256-xKIejVxOd19mblL1ZwpJH91dgKQS5g8U08EL8lGGelA=";
+}
diff --git a/pkgs/development/nim-packages/redis/default.nix b/pkgs/development/nim-packages/redis/default.nix
new file mode 100644
index 000000000000..1768bf1976f5
--- /dev/null
+++ b/pkgs/development/nim-packages/redis/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "zedeus";
+  repo = "redis";
+  rev = "94bcbf1";
+  sha256 = "1p9zv4f4lqrjqa8fk98cb89b9fzlf866jc584ll9sws14904i80j";
+}
diff --git a/pkgs/development/nim-packages/redpool/default.nix b/pkgs/development/nim-packages/redpool/default.nix
new file mode 100644
index 000000000000..ef14854b32dc
--- /dev/null
+++ b/pkgs/development/nim-packages/redpool/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "zedeus";
+  repo = "redpool";
+  rev = "57aeb25";
+  sha256 = "0fph7qlia6fvya1zqzbgvww2hk5pd0vq1wlf9ij9jyn655mg0w3q";
+}
diff --git a/pkgs/development/nim-packages/regex/default.nix b/pkgs/development/nim-packages/regex/default.nix
new file mode 100644
index 000000000000..d89fbdd60538
--- /dev/null
+++ b/pkgs/development/nim-packages/regex/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "nitely";
+  repo = "nim-regex";
+  rev = "2e32fdc";
+  sha256 = "1hrl40mwql7nh4wc7sdhmk8bj5728b93v5a93j49v660l0rn4qx8";
+}
diff --git a/pkgs/development/nim-packages/sass/default.nix b/pkgs/development/nim-packages/sass/default.nix
new file mode 100644
index 000000000000..79885ed9ec5a
--- /dev/null
+++ b/pkgs/development/nim-packages/sass/default.nix
@@ -0,0 +1,13 @@
+{ buildNimPackage, fetchFromGitHub, libsass }:
+
+buildNimPackage rec {
+  pname = "sass";
+  version = "e683aa1";
+  src = fetchFromGitHub {
+    owner = "dom96";
+    repo = pname;
+    rev = version;
+    sha256 = "0qvly5rilsqqsyvr67pqhglm55ndc4nd6v90jwswbnigxiqf79lc";
+  };
+  propagatedBuildInputs = [ libsass ];
+}
diff --git a/pkgs/development/nim-packages/sdl2/default.nix b/pkgs/development/nim-packages/sdl2/default.nix
new file mode 100644
index 000000000000..ddcdf072c6b4
--- /dev/null
+++ b/pkgs/development/nim-packages/sdl2/default.nix
@@ -0,0 +1,17 @@
+{ lib, buildNimPackage, fetchNimble, SDL2 }:
+
+buildNimPackage rec {
+  pname = "sdl2";
+  version = "2.0.4";
+  src = fetchNimble {
+    inherit pname version;
+    hash = "sha256-Vtcj8goI4zZPQs2TbFoBFlcR5UqDtOldaXSH/+/xULk=";
+  };
+  propagatedBuildInputs = [ SDL2 ];
+  doCheck = true;
+  meta = {
+    description = "Nim wrapper for SDL 2.x";
+    platforms = lib.platforms.linux; # Problems with Darwin.
+    license = [ lib.licenses.mit ];
+  };
+}
diff --git a/pkgs/development/nim-packages/segmentation/default.nix b/pkgs/development/nim-packages/segmentation/default.nix
new file mode 100644
index 000000000000..c695cd00ca92
--- /dev/null
+++ b/pkgs/development/nim-packages/segmentation/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "nitely";
+  repo = "nim-segmentation";
+  rev = "v0.1.0";
+  sha256 = "007bkx8dwy8n340zbp6wyqfsq9bh6q5ykav1ywdlwykyp1n909bh";
+}
diff --git a/pkgs/development/nim-packages/supersnappy/default.nix b/pkgs/development/nim-packages/supersnappy/default.nix
new file mode 100644
index 000000000000..471543eca411
--- /dev/null
+++ b/pkgs/development/nim-packages/supersnappy/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "guzba";
+  repo = "supersnappy";
+  rev = "1.1.5";
+  sha256 = "1y26sgnszvdf5sn7j0jx2dpd4i03mvbk9i9ni9kbyrs798bjwi6z";
+}
diff --git a/pkgs/development/nim-packages/typography/default.nix b/pkgs/development/nim-packages/typography/default.nix
new file mode 100644
index 000000000000..59037cbd9dd3
--- /dev/null
+++ b/pkgs/development/nim-packages/typography/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "typography";
+  version = "0.7.9";
+  hash = "sha256-IYjw3PCp5XzVed2fGGCt9Hb60cxFeF0BUZ7L5PedTLU=";
+}
diff --git a/pkgs/development/nim-packages/unicodedb/default.nix b/pkgs/development/nim-packages/unicodedb/default.nix
new file mode 100644
index 000000000000..8b60710e8210
--- /dev/null
+++ b/pkgs/development/nim-packages/unicodedb/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "nitely";
+  repo = "nim-unicodedb";
+  rev = "v0.9.0";
+  sha256 = "06j8d0bjbpv1iibqlmrac4qb61ggv17hvh6nv4pbccqk1rlpxhsq";
+}
diff --git a/pkgs/development/nim-packages/unicodeplus/default.nix b/pkgs/development/nim-packages/unicodeplus/default.nix
new file mode 100644
index 000000000000..772524eaf94b
--- /dev/null
+++ b/pkgs/development/nim-packages/unicodeplus/default.nix
@@ -0,0 +1,8 @@
+{ fetchFromGitHub }:
+
+fetchFromGitHub {
+  owner = "nitely";
+  repo = "nim-unicodeplus";
+  rev = "v0.8.0";
+  sha256 = "181wzwivfgplkqn5r4crhnaqgsza7x6fi23i86djb2dxvm7v6qxk";
+}
diff --git a/pkgs/development/nim-packages/vmath/default.nix b/pkgs/development/nim-packages/vmath/default.nix
new file mode 100644
index 000000000000..9ca48c43d7f4
--- /dev/null
+++ b/pkgs/development/nim-packages/vmath/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "vmath";
+  version = "1.0.3";
+  hash = "sha256-zzSKXjuTZ46HTFUs0N47mxEKTKIdS3dwr+60sQYSdn0=";
+}
diff --git a/pkgs/development/nim-packages/zippy/default.nix b/pkgs/development/nim-packages/zippy/default.nix
new file mode 100644
index 000000000000..230892b68899
--- /dev/null
+++ b/pkgs/development/nim-packages/zippy/default.nix
@@ -0,0 +1,7 @@
+{ fetchNimble }:
+
+fetchNimble {
+  pname = "zippy";
+  version = "0.5.6";
+  hash = "sha256-axp4t9+8TFSpvnATlRKZyuOGLA0e/XKfvrVSwreXpC4=";
+}
diff --git a/pkgs/development/tools/misc/nimlsp/default.nix b/pkgs/development/tools/misc/nimlsp/default.nix
index b1d59c9450ac..0e837b8fd614 100644
--- a/pkgs/development/tools/misc/nimlsp/default.nix
+++ b/pkgs/development/tools/misc/nimlsp/default.nix
@@ -1,22 +1,9 @@
-{ lib, stdenv, fetchFromGitHub, srcOnly, nim }:
-let
-  astpatternmatching = fetchFromGitHub {
-    owner = "krux02";
-    repo = "ast-pattern-matching";
-    rev = "87f7d163421af5a4f5e5cb6da7b93278e6897e96";
-    sha256 = "19mb5bb6riia8380p5dpc3q0vwgrj958dd6p7vw8vkvwiqrzg6zq";
-  };
+{ lib, nimPackages, fetchFromGitHub, srcOnly, nim }:
 
-  jsonschema = fetchFromGitHub {
-    owner = "PMunch";
-    repo = "jsonschema";
-    rev = "7b41c03e3e1a487d5a8f6b940ca8e764dc2cbabf";
-    sha256 = "1js64jqd854yjladxvnylij4rsz7212k31ks541pqrdzm6hpblbz";
-  };
-in
-stdenv.mkDerivation rec {
+nimPackages.buildNimPackage rec {
   pname = "nimlsp";
   version = "0.3.2";
+  nimBinOnly = true;
 
   src = fetchFromGitHub {
     owner = "PMunch";
@@ -25,18 +12,15 @@ stdenv.mkDerivation rec {
     sha256 = "1lm823nvpp3bj9527jd8n1jxh6y8p8ngkfkj91p94m7ffai6jazq";
   };
 
-  nativeBuildInputs = [ nim ];
+  buildInputs = with nimPackages; [ astpatternmatching jsonschema ];
 
-  buildPhase = ''
-    export HOME=$TMPDIR
-    nim -d:release -p:${astpatternmatching}/src -p:${jsonschema}/src \
-      c --threads:on -d:nimcore -d:nimsuggest -d:debugCommunication \
-      -d:debugLogging -d:explicitSourcePath=${srcOnly nim.passthru.nim} -d:tempDir=/tmp src/nimlsp
-  '';
+  nimFlags = [
+    "--threads:on"
+    "-d:explicitSourcePath=${srcOnly nimPackages.nim.passthru.nim}"
+    "-d:tempDir=/tmp"
+  ];
 
-  installPhase = ''
-    install -Dt $out/bin src/nimlsp
-  '';
+  nimDefines = [ "nimcore" "nimsuggest" "debugCommunication" "debugLogging" ];
 
   meta = with lib; {
     description = "Language Server Protocol implementation for Nim";
diff --git a/pkgs/development/tools/nrpl/default.nix b/pkgs/development/tools/nrpl/default.nix
index 67a86ca8dec5..84147faf74e5 100644
--- a/pkgs/development/tools/nrpl/default.nix
+++ b/pkgs/development/tools/nrpl/default.nix
@@ -1,8 +1,9 @@
-{ stdenv, lib, fetchFromGitHub, fetchpatch, makeWrapper, nim, pcre, tinycc }:
+{ lib, nimPackages, fetchFromGitHub, fetchpatch, makeWrapper, pcre, tinycc }:
 
-stdenv.mkDerivation {
+nimPackages.buildNimPackage {
   pname = "nrpl";
   version = "20150522";
+  nimBinOnly = true;
 
   src = fetchFromGitHub {
     owner  = "wheineman";
@@ -12,7 +13,7 @@ stdenv.mkDerivation {
   };
 
   nativeBuildInputs = [ makeWrapper ];
-  buildInputs = [ nim pcre ];
+  buildInputs = [ pcre ];
 
   patches = [
     (fetchpatch {
@@ -24,16 +25,9 @@ stdenv.mkDerivation {
 
   NIX_LDFLAGS = "-lpcre";
 
-  buildPhase = ''
-    HOME=$TMPDIR
-    nim c -d:release nrpl.nim
-  '';
-
-  installPhase = "install -Dt $out/bin nrpl";
-
   postFixup = ''
     wrapProgram $out/bin/nrpl \
-      --prefix PATH : ${lib.makeBinPath [ nim tinycc ]}
+      --prefix PATH : ${lib.makeBinPath [ nimPackages.nim tinycc ]}
   '';
 
   meta = with lib; {
diff --git a/pkgs/servers/nitter/default.nix b/pkgs/servers/nitter/default.nix
index b5137c92b450..36bffaa3ec61 100644
--- a/pkgs/servers/nitter/default.nix
+++ b/pkgs/servers/nitter/default.nix
@@ -1,99 +1,9 @@
-{ lib
-, stdenv
-, nixosTests
-, fetchFromGitHub
-, nim
-, libsass
-}:
+{ lib, nimPackages, nixosTests, fetchFromGitHub, libsass }:
 
-let
-  jester = fetchFromGitHub {
-    owner = "dom96";
-    repo = "jester";
-    rev = "v0.5.0";
-    sha256 = "0m8a4ss4460jd2lcbqcbdd68jhcy35xg7qdyr95mh8rflwvmcvhk";
-  };
-  karax = fetchFromGitHub {
-    owner = "karaxnim";
-    repo = "karax";
-    rev = "1.1.2";
-    sha256 = "07ykrd21hd76vlmkqpvv5xvaxw6aaq87bky47p2420ni85a6d94j";
-  };
-  sass = fetchFromGitHub {
-    owner = "dom96";
-    repo = "sass";
-    rev = "e683aa1";
-    sha256 = "0qvly5rilsqqsyvr67pqhglm55ndc4nd6v90jwswbnigxiqf79lc";
-  };
-  regex = fetchFromGitHub {
-    owner = "nitely";
-    repo = "nim-regex";
-    rev = "2e32fdc";
-    sha256 = "1hrl40mwql7nh4wc7sdhmk8bj5728b93v5a93j49v660l0rn4qx8";
-  };
-  unicodedb = fetchFromGitHub {
-    owner = "nitely";
-    repo = "nim-unicodedb";
-    rev = "v0.9.0";
-    sha256 = "06j8d0bjbpv1iibqlmrac4qb61ggv17hvh6nv4pbccqk1rlpxhsq";
-  };
-  unicodeplus= fetchFromGitHub {
-    owner = "nitely";
-    repo = "nim-unicodeplus";
-    rev = "v0.8.0";
-    sha256 = "181wzwivfgplkqn5r4crhnaqgsza7x6fi23i86djb2dxvm7v6qxk";
-  };
-  segmentation = fetchFromGitHub {
-    owner = "nitely";
-    repo = "nim-segmentation";
-    rev = "v0.1.0";
-    sha256 = "007bkx8dwy8n340zbp6wyqfsq9bh6q5ykav1ywdlwykyp1n909bh";
-  };
-  nimcrypto = fetchFromGitHub {
-    owner = "cheatfate";
-    repo = "nimcrypto";
-    rev = "a5742a9a214ac33f91615f3862c7b099aec43b00";
-    sha256 = "0al0jsaicm8vyr63n909dq1glhvpra1n9sllmj0r7lsjsdb59wsz";
-  };
-  markdown = fetchFromGitHub {
-    owner = "soasme";
-    repo = "nim-markdown";
-    rev = "abdbe5e";
-    sha256 = "0f3c1sxvhbbds43c9l8cz69pfpf984msj1lv4pb7bzpxb5zil2wy";
-  };
-  packedjson = fetchFromGitHub {
-    owner = "Araq";
-    repo = "packedjson";
-    rev = "7198cc8";
-    sha256 = "1ay2zd88q8hvpvigsg8h0y5vc65hk3lk0d48fy9hwg4lcng19mp1";
-  };
-  supersnappy = fetchFromGitHub {
-    owner = "guzba";
-    repo = "supersnappy";
-    rev = "1.1.5";
-    sha256 = "1y26sgnszvdf5sn7j0jx2dpd4i03mvbk9i9ni9kbyrs798bjwi6z";
-  };
-  redpool = fetchFromGitHub {
-    owner = "zedeus";
-    repo = "redpool";
-    rev = "57aeb25";
-    sha256 = "0fph7qlia6fvya1zqzbgvww2hk5pd0vq1wlf9ij9jyn655mg0w3q";
-  };
-  frosty = fetchFromGitHub {
-    owner = "disruptek";
-    repo = "frosty";
-    rev = "0.3.1";
-    sha256 = "0hd6484ihjgl57gmqyp5xfq5prycb49k0313fqky600mhz71nmyz";
-  };
-  redis = fetchFromGitHub {
-    owner = "zedeus";
-    repo = "redis";
-    rev = "94bcbf1";
-    sha256 = "1p9zv4f4lqrjqa8fk98cb89b9fzlf866jc584ll9sws14904i80j";
-  };
-in stdenv.mkDerivation rec {
+nimPackages.buildNimPackage rec {
   pname = "nitter";
   version = "unstable-2021-07-18";
+  nimBinOnly = true;
 
   src = fetchFromGitHub {
     owner = "zedeus";
@@ -102,28 +12,33 @@ in stdenv.mkDerivation rec {
     sha256 = "1dl8ndyv8m1hnydrp5xilcpp2cfbp02d5jap3y42i4nazc9ar6p4";
   };
 
-  nativeBuildInputs = [ nim ];
-  buildInputs = [ libsass ];
+  buildInputs = with nimPackages; [
+    jester
+    karax
+    sass
+    regex
+    unicodedb
+    unicodeplus
+    segmentation
+    nimcrypto
+    markdown
+    packedjson
+    supersnappy
+    redpool
+    frosty
+    redis
+  ];
 
-  buildPhase = ''
-    runHook preBuild
-    export HOME=$TMPDIR
-    nim -d:release -p:${jester} -p:${karax} -p:${sass}/src -p:${regex}/src -p:${unicodedb}/src -p:${unicodeplus}/src -p:${segmentation}/src -p:${nimcrypto} -p:${markdown}/src -p:${packedjson} -p:${supersnappy}/src -p:${redpool}/src -p:${frosty} -p:${redis}/src c src/$pname
-    nim -p:${sass}/src c --hint[Processing]:off -r tools/gencss
-    runHook postBuild
+  postBuild = ''
+    nim c --hint[Processing]:off -r tools/gencss
   '';
 
-  installPhase = ''
-    runHook preInstall
-    install -Dt $out/bin src/$pname
+  postInstall = ''
     mkdir -p $out/share/nitter
     cp -r public $out/share/nitter/public
-    runHook postInstall
   '';
 
-  passthru.tests = {
-    inherit (nixosTests) nitter;
-  };
+  passthru.tests = { inherit (nixosTests) nitter; };
 
   meta = with lib; {
     description = "Alternative Twitter front-end";
diff --git a/pkgs/tools/text/hottext/default.nix b/pkgs/tools/text/hottext/default.nix
index ca0cbf9d1a09..6fe7a686c100 100644
--- a/pkgs/tools/text/hottext/default.nix
+++ b/pkgs/tools/text/hottext/default.nix
@@ -1,81 +1,30 @@
-{ lib, stdenv, fetchurl, fetchFromGitHub, nim, gentium, SDL2, makeDesktopItem }:
+{ lib, nimPackages, fetchurl, gentium, makeDesktopItem }:
 
-let
-  treeformLibs = lib.attrsets.mapAttrsToList (repo: args:
-    fetchFromGitHub ({
-      inherit repo;
-      owner = "treeform";
-    } // args)) {
-      bumpy = {
-        rev = "1.0.3";
-        sha256 = "sha256-mDmDlhOGoYYjKgF5j808oT2NqRlfcOdLSDE3WtdJFQ0=";
-      };
-      chroma = {
-        rev = "0.2.5";
-        sha256 = "sha256-6lNHpO2aMorgkaPfo6kRcOs9r5R6T/kislVmkeoulw8=";
-      };
-      flatty = {
-        rev = "0.2.1";
-        sha256 = "sha256-TqNnRh2+i6n98ktLRVQxt9CVw17FGLNYq29rJoMus/0=";
-      };
-      pixie = {
-        rev = "1.1.3";
-        sha256 = "sha256-xKIejVxOd19mblL1ZwpJH91dgKQS5g8U08EL8lGGelA=";
-      };
-      typography = {
-        rev = "0.7.9";
-        sha256 = "sha256-IYjw3PCp5XzVed2fGGCt9Hb60cxFeF0BUZ7L5PedTLU=";
-      };
-      vmath = {
-        rev = "1.0.3";
-        sha256 = "sha256-zzSKXjuTZ46HTFUs0N47mxEKTKIdS3dwr+60sQYSdn0=";
-      };
-    };
-
-  nimLibs = treeformLibs ++ [
-    (fetchFromGitHub {
-      owner = "nim-lang";
-      repo = "sdl2";
-      rev = "v2.0.2";
-      sha256 = "sha256-Ivx/gxDa2HVDjCVrJVu23i4d0pDzzv+ThmwqNjtkjsA=";
-    })
-    (fetchFromGitHub {
-      owner = "guzba";
-      repo = "nimsimd";
-      rev = "1.0.0";
-      sha256 = "sha256-kp61fylAJ6MSN9hLYLi7CU2lxVR/lbrNCvZTe0LJLGo=";
-    })
-    (fetchFromGitHub {
-      owner = "guzba";
-      repo = "zippy";
-      rev = "0.5.6";
-      sha256 = "sha256-axp4t9+8TFSpvnATlRKZyuOGLA0e/XKfvrVSwreXpC4=";
-    })
-  ];
-
-in stdenv.mkDerivation rec {
+nimPackages.buildNimPackage rec {
   pname = "hottext";
   version = "1.4";
 
+  nimBinOnly = true;
+
   src = fetchurl {
     url = "https://git.sr.ht/~ehmry/hottext/archive/v${version}.tar.gz";
     sha256 = "sha256-hIUofi81zowSMbt1lUsxCnVzfJGN3FEiTtN8CEFpwzY=";
   };
 
-  nativeBuildInputs = [ nim ];
-  buildInputs = [ SDL2 ];
-
-  nimFlags = [ "-d:release" ] ++ map (lib: "--path:${lib}/src") nimLibs;
+  buildInputs = with nimPackages; [
+    bumpy
+    chroma
+    flatty
+    nimsimd
+    pixie
+    sdl2
+    typography
+    vmath
+    zippy
+  ];
 
   HOTTEXT_FONT_PATH = "${gentium}/share/fonts/truetype/GentiumPlus-Regular.ttf";
 
-  buildPhase = ''
-    runHook preBuild
-    HOME=$TMPDIR
-    nim $nimFlags compile src/$pname
-    runHook postBuild
-  '';
-
   desktopItem = makeDesktopItem {
     categories = "Utility;";
     comment = meta.description;
@@ -84,11 +33,8 @@ in stdenv.mkDerivation rec {
     name = pname;
   };
 
-  installPhase = ''
-    runHook preInstall
-    install -Dt $out/bin src/$pname
+  postInstall = ''
     cp -r $desktopItem/* $out
-    runHook postInstall
   '';
 
   meta = with lib; {
diff --git a/pkgs/tools/wayland/swaycwd/default.nix b/pkgs/tools/wayland/swaycwd/default.nix
index 36e223f8d4ca..401144f74d2a 100644
--- a/pkgs/tools/wayland/swaycwd/default.nix
+++ b/pkgs/tools/wayland/swaycwd/default.nix
@@ -1,8 +1,8 @@
-{ lib, nim, stdenv, fetchFromGitLab
+{ lib, nimPackages, fetchFromGitLab
 , enableShells ? [ "bash" "zsh" "fish" "sh" "posh" ]
 }:
 
-stdenv.mkDerivation {
+nimPackages.buildNimPackage {
     name = "swaycwd";
     version = "0.0.1";
 
@@ -13,27 +13,18 @@ stdenv.mkDerivation {
       hash = "sha256-MkyY3wWByQo0l0J28xKDfGtxfazVPRyZHCObl9Fszh4=";
     };
 
-    configurePhase = ''
-      runHook preConfigure
+    preConfigure = ''
       {
         echo 'let enabledShells: seq[string] = @${builtins.toJSON enableShells}'
         echo 'export enabledShells'
       } > shells.nim
-      runHook postConfigure
+      cat << EOF > swaycwd.nimble
+      srcDir = "."
+      bin = "swaycwd"
+      EOF
     '';
 
-    nativeBuildInputs = [ nim ];
-
-    buildPhase = ''
-      export HOME=$TMPDIR
-      nim c --opt:speed -d:release swaycwd.nim
-    '';
-
-    installPhase = ''
-      runHook preInstall
-      install -D -m555 -t $out/bin swaycwd
-      runHook postInstall
-    '';
+    nimFlags = [ "--opt:speed" ];
 
     meta = with lib; {
       homepage = "https://gitlab.com/cab404/swaycwd";
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 5c1caa45568e..96873691fccc 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12210,6 +12210,7 @@ with pkgs;
 
   inherit (callPackages ../development/compilers/nim { })
     nim-unwrapped nimble-unwrapped nim;
+  nimPackages = recurseIntoAttrs nim.pkgs;
 
   nrpl = callPackage ../development/tools/nrpl { };
 
diff --git a/pkgs/top-level/nim-packages.nix b/pkgs/top-level/nim-packages.nix
new file mode 100644
index 000000000000..5d45b0c5eca9
--- /dev/null
+++ b/pkgs/top-level/nim-packages.nix
@@ -0,0 +1,75 @@
+{ lib, pkgs, stdenv, newScope, nim, fetchFromGitHub }:
+
+lib.makeScope newScope (self:
+  let callPackage = self.callPackage;
+  in {
+    inherit nim;
+    nim_builder = callPackage ../development/nim-packages/nim_builder { };
+    buildNimPackage =
+      callPackage ../development/nim-packages/build-nim-package { };
+    fetchNimble = callPackage ../development/nim-packages/fetch-nimble { };
+
+    astpatternmatching =
+      callPackage ../development/nim-packages/astpatternmatching { };
+
+    bumpy = callPackage ../development/nim-packages/bumpy { };
+
+    chroma = callPackage ../development/nim-packages/chroma { };
+
+    c2nim = callPackage ../development/nim-packages/c2nim { };
+
+    docopt = callPackage ../development/nim-packages/docopt { };
+
+    flatty = callPackage ../development/nim-packages/flatty { };
+
+    frosty = callPackage ../development/nim-packages/frosty { };
+
+    hts-nim = callPackage ../development/nim-packages/hts-nim { };
+
+    jester = callPackage ../development/nim-packages/jester { };
+
+    jsonschema = callPackage ../development/nim-packages/jsonschema { };
+
+    karax = callPackage ../development/nim-packages/karax { };
+
+    lscolors = callPackage ../development/nim-packages/lscolors { };
+
+    markdown = callPackage ../development/nim-packages/markdown { };
+
+    nimcrypto = callPackage ../development/nim-packages/nimcrypto { };
+
+    nimbox = callPackage ../development/nim-packages/nimbox { };
+
+    nimsimd = callPackage ../development/nim-packages/nimsimd { };
+
+    noise = callPackage ../development/nim-packages/noise { };
+
+    packedjson = callPackage ../development/nim-packages/packedjson { };
+
+    pixie = callPackage ../development/nim-packages/pixie { };
+
+    redis = callPackage ../development/nim-packages/redis { };
+
+    redpool = callPackage ../development/nim-packages/redpool { };
+
+    regex = callPackage ../development/nim-packages/regex { };
+
+    sass = callPackage ../development/nim-packages/sass { };
+
+    sdl2 = callPackage ../development/nim-packages/sdl2 { };
+
+    segmentation = callPackage ../development/nim-packages/segmentation { };
+
+    supersnappy = callPackage ../development/nim-packages/supersnappy { };
+
+    typography = callPackage ../development/nim-packages/typography { };
+
+    unicodedb = callPackage ../development/nim-packages/unicodedb { };
+
+    unicodeplus = callPackage ../development/nim-packages/unicodeplus { };
+
+    vmath = callPackage ../development/nim-packages/vmath { };
+
+    zippy = callPackage ../development/nim-packages/zippy { };
+
+  })