nim: remove 1_0, 2_0 and 2_2 versions and aliases; nim: 2.2.4 -> 2.2.10

writers/writeNim: migrate package to nim
nim: remove nativeStacktraces and gnuReadline args
nim: use pname instead

It's time that we remove nim1, nim1 has been a package for a while and
nim has moved on during that time to the v2 versions.
It's also time that nim had some attention in nixpkgs and upgrade the
nim 2 versions.

Also fixes an issue with nim-unwrapped missing the pname and version.
See #485742 for more info.

Co-authored-by: éclairevoyant
<848000+eclairevoyant@users.noreply.github.com>

doc/release-notes/rl-2611.section.md

@@ -70,6 +70,8 @@
 - `rebuilderd` has been updated to 0.27.0 introducing breaking changes. See upstream changelog for details: [0.26.0](https://github.com/kpcyrd/rebuilderd/releases/tag/v0.26.0), [0.27.0](https://github.com/kpcyrd/rebuilderd/releases/tag/v0.27.0)
 
 - Starting with v14, `flameshot` will primarily utilise xdg-desktop-portal calls for screenshotting. This will directly affect users on X11 window managers due to the lack of a compatible portal with Screenshot feature. See [upstream changelog](https://github.com/flameshot-org/flameshot/releases/tag/v14.0.0) or [NixOS Flameshot](https://wiki.nixos.org/wiki/Flameshot) wiki page for workarounds.
+- `nim1` and respective aliases have been removed due to entering EOL; please migrate to `nim` or `nim-unwrapped` (nim 2).
+- `nim-2_0` & `nim-2_2` and respective aliases have been removed; please migrate to `nim` or `nim-unwrapped` (nim 2.2.10).
 
 ## Other Notable Changes {#sec-nixpkgs-release-26.11-notable-changes}
 

pkgs/build-support/build-nim-package.nix

@@ -3,8 +3,7 @@
   buildPackages,
   callPackage,
   stdenv,
-  nim1,
-  nim2,
+  nim,
   nim_builder,
   defaultNimVersion ? 2,
   nimOverrides,
@@ -38,7 +37,7 @@ let
       nim_builder --phase:install
       runHook postInstall
     '';
-    meta = { inherit (nim2.meta) maintainers platforms; };
+    meta = { inherit (nim.meta) maintainers platforms; };
   };
 
   fodFromLockEntry =
@@ -116,15 +115,10 @@ let
           ...
         }:
         (
-          if requiredNimVersion == 1 then
+          if requiredNimVersion == 2 then
             {
               depsBuildBuild = [ nim_builder ] ++ depsBuildBuild;
-              nativeBuildInputs = [ nim1 ] ++ nativeBuildInputs;
-            }
-          else if requiredNimVersion == 2 then
-            {
-              depsBuildBuild = [ nim_builder ] ++ depsBuildBuild;
-              nativeBuildInputs = [ nim2 ] ++ nativeBuildInputs;
+              nativeBuildInputs = [ nim ] ++ nativeBuildInputs;
             }
           else
             throw "requiredNimVersion ${toString requiredNimVersion} is not valid"

pkgs/build-support/writers/scripts.nix

@@ -799,7 +799,7 @@ rec {
     ## `pkgs.writers.writeNim` usage example
 
     ```nix
-      writeNim "hello-nim" { nim = pkgs.nim2; } ''
+      writeNim "hello-nim" { nim = pkgs.nim; } ''
         echo "hello nim"
       '';
     ```
@@ -809,7 +809,7 @@ rec {
     name:
     {
       makeWrapperArgs ? [ ],
-      nim ? pkgs.nim2,
+      nim ? pkgs.nim,
       nimCompileOptions ? { },
       strip ? true,
     }:

pkgs/by-name/ni/nim-1_0/nim.cfg.patch

@@ -1,31 +0,0 @@
-diff --git a/config/nim.cfg b/config/nim.cfg
-index 3b964d124..850ed0ed9 100644
---- a/config/nim.cfg
-+++ b/config/nim.cfg
-@@ -8,26 +8,12 @@
- # Environment variables can be accessed like so:
- #  gcc.path %= "$CC_PATH"
- 
--cc = gcc
--
- # additional options always passed to the compiler:
- --parallel_build: "0" # 0 to auto-detect number of processors
- 
- hint[LineTooLong]=off
- #hint[XDeclaredButNotUsed]=off
- 
--# Examples of how to setup a cross-compiler:
--
--# Cross-compiling for Raspberry Pi.
--# (This compiler is available in gcc-arm-linux-gnueabihf package on Ubuntu)
--arm.linux.gcc.exe = "arm-linux-gnueabihf-gcc"
--arm.linux.gcc.linkerexe = "arm-linux-gnueabihf-gcc"
--
--# For OpenWRT, you will also need to adjust PATH to point to your toolchain.
--mips.linux.gcc.exe = "mips-openwrt-linux-gcc"
--mips.linux.gcc.linkerexe = "mips-openwrt-linux-gcc"
--
--
- path="$lib/deprecated/core"
- path="$lib/deprecated/pure"
- path="$lib/pure/collections"

pkgs/by-name/ni/nim-1_0/package.nix

@@ -1,9 +0,0 @@
-{
-  nim-unwrapped-1,
-  nim,
-}:
-
-nim.passthru.wrapNim {
-  nimUnwrapped = nim-unwrapped-1;
-  patches = [ ./nim.cfg.patch ];
-}

pkgs/by-name/ni/nim-2_0/package.nix

@@ -1,9 +0,0 @@
-{
-  nim-unwrapped-2_0,
-  nim-2_2,
-}:
-
-nim-2_2.passthru.wrapNim {
-  nimUnwrapped = nim-unwrapped-2_0;
-  inherit (nim-2_2) patches;
-}

pkgs/by-name/ni/nim-unwrapped-1_0/extra-mangling.patch

@@ -1,52 +0,0 @@
-diff --git a/compiler/modulepaths.nim b/compiler/modulepaths.nim
-index fa8fab08a..63b0cb44d 100644
---- a/compiler/modulepaths.nim
-+++ b/compiler/modulepaths.nim
-@@ -73,6 +73,17 @@ proc checkModuleName*(conf: ConfigRef; n: PNode; doLocalError=true): FileIndex =
-   else:
-     result = fileInfoIdx(conf, fullPath)
- 
-+proc rot13(result: var string) =
-+  # don't mangle .nim
-+  let finalIdx =
-+    if result.endsWith(".nim"): result.len - 4
-+    else: result.len
-+  for i, c in result[0..<finalIdx]:
-+    case c
-+    of 'a'..'m', 'A'..'M': result[i] = char(c.uint8 + 13)
-+    of 'n'..'z', 'N'..'Z': result[i] = char(c.uint8 - 13)
-+    else: discard
-+
- proc mangleModuleName*(conf: ConfigRef; path: AbsoluteFile): string =
-   ## Mangle a relative module path to avoid path and symbol collisions.
-   ##
-@@ -81,9 +92,11 @@ proc mangleModuleName*(conf: ConfigRef; path: AbsoluteFile): string =
-   ##
-   ## Example:
-   ## `foo-#head/../bar` becomes `@foo-@hhead@s..@sbar`
--  "@m" & relativeTo(path, conf.projectPath).string.multiReplace(
-+  result = "@m" & relativeTo(path, conf.projectPath).string.multiReplace(
-     {$os.DirSep: "@s", $os.AltSep: "@s", "#": "@h", "@": "@@", ":": "@c"})
-+  rot13(result)
- 
- proc demangleModuleName*(path: string): string =
-   ## Demangle a relative module path.
-   result = path.multiReplace({"@@": "@", "@h": "#", "@s": "/", "@m": "", "@c": ":"})
-+  rot13(result)
-diff --git a/compiler/msgs.nim b/compiler/msgs.nim
-index ae4bcfcb8..1ad7e5c08 100644
---- a/compiler/msgs.nim
-+++ b/compiler/msgs.nim
-@@ -661,8 +661,10 @@ proc uniqueModuleName*(conf: ConfigRef; fid: FileIndex): string =
-   for i in 0..<trunc:
-     let c = rel[i]
-     case c
--    of 'a'..'z':
--      result.add c
-+    of 'a'..'m':
-+      result.add char(c.uint8 + 13)
-+    of 'n'..'z':
-+      result.add char(c.uint8 - 13)
-     of {os.DirSep, os.AltSep}:
-       result.add 'Z' # because it looks a bit like '/'
-     of '.':

pkgs/by-name/ni/nim-unwrapped-1_0/package.nix

@@ -1,30 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  nim-unwrapped-2,
-}:
-
-nim-unwrapped-2.overrideAttrs (
-  finalAttrs: prevAttrs: {
-    version = "1.6.20";
-    src = fetchurl {
-      url = "https://nim-lang.org/download/nim-${finalAttrs.version}.tar.xz";
-      hash = "sha256-/+0EdQTR/K9hDw3Xzz4Ce+kaKSsMnFEWFQTC87mE/7k=";
-    };
-
-    patches =
-      builtins.filter (
-        p:
-        builtins.elem (baseNameOf p) [
-          "NIM_CONFIG_DIR.patch"
-          "nixbuild.patch"
-        ]
-      ) nim-unwrapped-2.patches
-      ++ [
-        ./extra-mangling.patch
-        # Mangle store paths of modules to prevent runtime dependence.
-      ]
-      ++ lib.optional (!stdenv.hostPlatform.isWindows) ./toLocation.patch;
-  }
-)

pkgs/by-name/ni/nim-unwrapped-1_0/toLocation.patch

@@ -1,16 +0,0 @@
-diff --git a/lib/std/private/miscdollars.nim b/lib/std/private/miscdollars.nim
-index 840fedf54..6c3436308 100644
---- a/lib/std/private/miscdollars.nim
-+++ b/lib/std/private/miscdollars.nim
-@@ -6,9 +6,8 @@ template toLocation*(result: var string, file: string | cstring, line: int, col:
-   # it can be done in a single place.
-   result.add file
-   if line > 0:
--    result.add "("
-+    result.add ":"
-     addInt(result, line)
-     if col > 0:
--      result.add ", "
-+      result.add ":"
-       addInt(result, col)
--    result.add ")"

pkgs/by-name/ni/nim-unwrapped-2_0/package.nix

@@ -1,27 +0,0 @@
-{
-  lib,
-  fetchurl,
-  nim-unwrapped-1,
-  nim-unwrapped-2_2,
-}:
-
-nim-unwrapped-2_2.overrideAttrs (
-  finalAttrs: previousAttrs: {
-    version = "2.0.16";
-    src = fetchurl {
-      url = "https://nim-lang.org/download/nim-${finalAttrs.version}.tar.xz";
-      hash = "sha256-sucMbAEbVQcJMJCoiH+iUncyCP0EfuOPhWLiVp5cN4o=";
-    };
-    patches = lib.lists.unique (
-      builtins.filter (
-        p:
-        builtins.elem (baseNameOf p) [
-          "NIM_CONFIG_DIR.patch"
-          "nixbuild.patch"
-          "extra-mangling.patch"
-          "openssl.patch"
-        ]
-      ) (nim-unwrapped-1.patches ++ nim-unwrapped-2_2.patches)
-    );
-  }
-)

pkgs/by-name/ni/nim-unwrapped-2_2/extra-mangling-2.patch

@@ -1,52 +0,0 @@
-diff --git a/compiler/modulegraphs.nim b/compiler/modulegraphs.nim
-index 77762d23a..59dd8903a 100644
---- a/compiler/modulegraphs.nim
-+++ b/compiler/modulegraphs.nim
-@@ -503,7 +503,11 @@ proc uniqueModuleName*(conf: ConfigRef; m: PSym): string =
-   for i in 0..<trunc:
-     let c = rel[i]
-     case c
--    of 'a'..'z', '0'..'9':
-+    of 'a'..'m':
-+      result.add char(c.uint8 + 13)
-+    of 'n'..'z':
-+      result.add char(c.uint8 - 13)
-+    of '0'..'9':
-       result.add c
-     of {os.DirSep, os.AltSep}:
-       result.add 'Z' # because it looks a bit like '/'
-diff --git a/compiler/modulepaths.nim b/compiler/modulepaths.nim
-index c9e6060e5..2b349f27c 100644
---- a/compiler/modulepaths.nim
-+++ b/compiler/modulepaths.nim
-@@ -79,6 +79,17 @@ proc checkModuleName*(conf: ConfigRef; n: PNode; doLocalError=true): FileIndex =
-   else:
-     result = fileInfoIdx(conf, fullPath)
- 
-+proc rot13(result: var string) =
-+  # don't mangle .nim
-+  let finalIdx =
-+    if result.endsWith(".nim"): result.len - 4
-+    else: result.len
-+  for i, c in result[0..<finalIdx]:
-+    case c
-+    of 'a'..'m', 'A'..'M': result[i] = char(c.uint8 + 13)
-+    of 'n'..'z', 'N'..'Z': result[i] = char(c.uint8 - 13)
-+    else: discard
-+
- proc mangleModuleName*(conf: ConfigRef; path: AbsoluteFile): string =
-   ## Mangle a relative module path to avoid path and symbol collisions.
-   ##
-@@ -87,9 +98,11 @@ proc mangleModuleName*(conf: ConfigRef; path: AbsoluteFile): string =
-   ##
-   ## Example:
-   ## `foo-#head/../bar` becomes `@foo-@hhead@s..@sbar`
--  "@m" & relativeTo(path, conf.projectPath).string.multiReplace(
-+  result = "@m" & relativeTo(path, conf.projectPath).string.multiReplace(
-     {$os.DirSep: "@s", $os.AltSep: "@s", "#": "@h", "@": "@@", ":": "@c"})
-+  rot13(result)
- 
- proc demangleModuleName*(path: string): string =
-   ## Demangle a relative module path.
-   result = path.multiReplace({"@@": "@", "@h": "#", "@s": "/", "@m": "", "@c": ":"})
-+  rot13(result)

pkgs/by-name/ni/nim-unwrapped/extra-mangling.patch

@@ -0,0 +1,17 @@
+diff --git a/compiler/modulegraphs.nim b/compiler/modulegraphs.nim
+index 55f751cda..b0b3e3f40 100644
+--- a/compiler/modulegraphs.nim
++++ b/compiler/modulegraphs.nim
+@@ -466,7 +466,11 @@ proc uniqueModuleName*(conf: ConfigRef; m: PSym): string =
+   for i in 0..<trunc:
+     let c = rel[i]
+     case c
+-    of 'a'..'z', '0'..'9':
++    of 'a'..'m':
++      result.add char(c.uint8 + 13)
++    of 'n'..'z':
++      result.add char(c.uint8 - 13)
++    of '0'..'9':
+       result.add c
+     of {os.DirSep, os.AltSep}:
+       result.add 'Z' # because it looks a bit like '/'

pkgs/by-name/ni/nim-unwrapped/package.nix

@@ -13,12 +13,12 @@
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "nim-unwrapped";
-  version = "2.2.4";
+  version = "2.2.10";
   strictDeps = true;
 
   src = fetchurl {
     url = "https://nim-lang.org/download/nim-${finalAttrs.version}.tar.xz";
-    hash = "sha256-+CtBl1D8zlYfP4l6BIaxgBhoRddvtdmfJIzhZhCBicc=";
+    hash = "sha256-eVe37QBCBrzxC8xPO0dEFTh45i8kMVUqmo6dP0Do1dU=";
   };
 
   buildInputs = [
@@ -36,7 +36,7 @@ stdenv.mkDerivation (finalAttrs: {
     ./nixbuild.patch
     # Load libraries at runtime by absolute path
 
-    ./extra-mangling-2.patch
+    ./extra-mangling.patch
     # Mangle store paths of modules to prevent runtime dependence.
 
     ./openssl.patch
@@ -67,9 +67,7 @@ stdenv.mkDerivation (finalAttrs: {
     "--cpu:${stdenv.hostPlatform.nim.cpu}"
     "--os:${stdenv.hostPlatform.nim.os}"
     "-d:release"
-    "-d:useGnuReadline"
-  ]
-  ++ lib.optional (stdenv.hostPlatform.isDarwin || stdenv.hostPlatform.isLinux) "-d:nativeStacktrace";
+  ];
 
   preBuild = lib.optionalString (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isAarch64) ''
     substituteInPlace makefile \

pkgs/by-name/ni/nim/package.nix

@@ -8,7 +8,7 @@
   makeWrapper,
   openssl,
   pcre,
-  nim-unwrapped-2_2 ? buildPackages.nim-unwrapped-2_2,
+  nim-unwrapped ? buildPackages.nim-unwrapped,
 }:
 
 let
@@ -18,7 +18,7 @@ let
       targetPlatformConfig = stdenv.targetPlatform.config;
     in
     stdenv.mkDerivation (finalAttrs: {
-      name = "${targetPlatformConfig}-nim-wrapper-${nimUnwrapped.version}";
+      pname = "${targetPlatformConfig}-nim-wrapper";
       inherit (nimUnwrapped) version;
       preferLocalBuild = true;
       strictDeps = true;
@@ -148,6 +148,6 @@ let
     });
 in
 wrapNim {
-  nimUnwrapped = nim-unwrapped-2_2;
+  nimUnwrapped = nim-unwrapped;
   patches = [ ./nim2.cfg.patch ];
 }

pkgs/top-level/aliases.nix

@@ -1621,6 +1621,16 @@ mapAliases {
   nfstrace = throw "nfstrace has been removed, as it was broken"; # Added 2025-08-25
   nginxQuic = throw "'nginxQuic' has been removed. QUIC support is now available in the default nginx builds.";
   ngrid = throw "'ngrid' has been removed as it has been unmaintained upstream and broken"; # Added 2025-11-15
+  nim1 = throw "'nim1' has reached EOL, please use 'nim'"; # Added 2026-03-06
+  nim-unwrapped-1 = throw "'nim-unwrapped-1' has reached EOL, please use 'nim-unwrapped'"; # Added 2026-03-06
+  nim-unwrapped-2 = throw "'nim-unwrapped-2' has been upgraded and removed, please use 'nim-unwrapped'"; # Added 2026-03-06
+  nim-unwrapped-2_0 = throw "'nim-unwrapped-2_0' has been upgraded and removed, please use 'nim-unwrapped'"; # Added 2026-03-06
+  nim-unwrapped-2_2 = throw "'nim-unwrapped-2_2' has been upgraded and removed, please use 'nim-unwrapped'"; # Added 2026-03-06
+  nim-unwrapped_1_0 = throw "'nim-unwrapped_1_0' has reached EOL, please use 'nim-unwrapped'"; # Added 2026-03-06
+  nim_1_0 = throw "'nim_1_0' has reached EOL, please use 'nim'"; # Added 2026-03-06
+  nim_2 = throw "'nim_2' has been upgraded and removed, please use 'nim'"; # Added 2026-03-06
+  nim_2_0 = throw "'nim_2_0' has been upgraded and removed, please use 'nim'"; # Added 2026-03-06
+  nim_2_2 = throw "'nim_2_2' has been upgraded and removed, please use 'nim'"; # Added 2026-03-06
   nimbo = throw "'nimbo' has been removed due to being archived upstream."; # Added 2026-01-18
   nitrokey-fido2-firmware = throw "'nitrokey-fido2-firmware' has been removed as it was broken and unmaintained upstream since 2022"; # Added 2026-03-23
   nix-direnv-flakes = throw "'nix-direnv-flakes' has been renamed to/replaced by 'nix-direnv'"; # Converted to throw 2025-10-27

pkgs/top-level/all-packages.nix

@@ -4024,13 +4024,6 @@ with pkgs;
 
   mozart2-binary = callPackage ../development/compilers/mozart/binary.nix { };
 
-  nim = nim2;
-  nim1 = nim-1_0;
-  nim2 = nim-2_2;
-  nim-unwrapped = nim-unwrapped-2_2;
-  nim-unwrapped-1 = nim-unwrapped-1_0;
-  nim-unwrapped-2 = nim-unwrapped-2_2;
-
   buildNimPackage = callPackage ../build-support/build-nim-package.nix { };
   buildNimSbom = callPackage ../build-support/build-nim-sbom.nix { };
   nimOverrides = callPackage ./nim-overrides.nix { };