diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 223df0c014fe..946a73425fb0 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -963,6 +963,12 @@
     matrix = "@alexshpilkin:matrix.org";
     name = "Alexander Shpilkin";
   };
+  AlexSKaye = {
+    email = "AlexSKaye@proton.me";
+    github = "AlexSKaye";
+    githubId = 3017212;
+    name = "Alex S. Kaye";
+  };
   alexvorobiev = {
     email = "alexander.vorobiev@gmail.com";
     github = "alexvorobiev";
diff --git a/pkgs/development/compilers/juniper/default.nix b/pkgs/development/compilers/juniper/default.nix
index 09a7f9b286b2..e6a737fb4ebc 100644
--- a/pkgs/development/compilers/juniper/default.nix
+++ b/pkgs/development/compilers/juniper/default.nix
@@ -1,42 +1,40 @@
-{ lib, stdenv, fetchzip, makeWrapper, mono }:
+{
+  lib,
+  fetchFromGitHub,
+  buildDotnetModule,
+  dotnetCorePackages,
+}:
 
-stdenv.mkDerivation rec {
+buildDotnetModule rec {
   pname = "juniper";
-  version = "2.3.0";
+  version = "4.0.0";
 
-  src = fetchzip {
-    url = "http://www.juniper-lang.org/installers/Juniper-${version}.zip";
-    sha256 = "10am6fribyl7742yk6ag0da4rld924jphxja30gynzqysly8j0vg";
-    stripRoot = false;
+  src = fetchFromGitHub {
+    owner = "calebh";
+    repo = "Juniper";
+    rev = "286050d6be5606db0973feda556d8fbc48b4566c";
+    hash = "sha256-b+aDDz46Hxgt+Oh2fNMiXFfXhuy16mzauousQGq9+dg=";
   };
 
-  doCheck = true;
+  projectFile = "Juniper/Juniper.fsproj";
+  nugetDeps = ./deps.nix;
+  dotnet-sdk = dotnetCorePackages.sdk_8_0;
+  dotnet-runtime = dotnetCorePackages.runtime_8_0;
 
-  nativeBuildInputs = [ makeWrapper ];
-
-  buildInputs = [ mono ];
-
-  installPhase = ''
-    runHook preInstall
-    rm juniper # original script with regular Linux assumptions
-    mkdir -p $out/bin
-    cp -r ./* $out
-    makeWrapper ${mono}/bin/mono $out/bin/juniper \
-      --add-flags "$out/Juniper.exe \$@"
-    runHook postInstall
-  '';
-
-  meta = with lib; {
+  meta = {
     description = "Functional reactive programming language for programming Arduino";
-    mainProgram = "juniper";
     longDescription = ''
-      Juniper targets Arduino and supports many features typical of functional programming languages, including algebraic data types, tuples, records,
-      pattern matching, immutable data structures, parametric polymorphic functions, and anonymous functions (lambdas).
-      Some imperative programming concepts are also present in Juniper, such as for, while and do while loops, the ability to mark variables as mutable, and mutable references.
+      The purpose of Juniper is to provide a functional reactive programming
+      platform for designing Arduino projects. FRP's high-level approach to
+      timing-based events fits naturally with Arduino, with which programming
+      almost entirely revolves around reacting to realtime events. Juniper
+      transpiles to Arduino C++, which is then compiled to an Arduino
+      executable.
     '';
     homepage = "https://www.juniper-lang.org/";
-    license = licenses.mit;
-    maintainers = [ ];
-    platforms = platforms.linux;
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ AlexSKaye ];
+    mainProgram = "Juniper";
+    inherit (dotnet-sdk.meta) platforms;
   };
 }
diff --git a/pkgs/development/compilers/juniper/deps.nix b/pkgs/development/compilers/juniper/deps.nix
new file mode 100644
index 000000000000..e25ea7b0bbf3
--- /dev/null
+++ b/pkgs/development/compilers/juniper/deps.nix
@@ -0,0 +1,203 @@
+{ fetchNuGet }:
+[
+  (fetchNuGet {
+    pname = "FParsec";
+    version = "1.1.1";
+    sha256 = "01s3zrxl9kfx0264wy0m555pfx0s0z165n4fvpgx63jlqwbd8m04";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.AspNetCore.App.Runtime.linux-x64";
+    version = "8.0.5";
+    sha256 = "1m9gp68z0wyv0xxr4aqc1c2v6v8grml3jxkiqabddn46d6gsisqh";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.App.Runtime.linux-x64";
+    version = "8.0.5";
+    sha256 = "15vadqfi0w7sdq0rh35rb9ph4h4qbal2i5m5ifabbfwjp7348z9c";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.Platforms";
+    version = "1.1.0";
+    sha256 = "08vh1r12g6ykjygq5d3vq09zylgb84l63k49jc4v8faw9g93iqqm";
+  })
+  (fetchNuGet {
+    pname = "Microsoft.NETCore.Targets";
+    version = "1.1.0";
+    sha256 = "193xwf33fbm0ni3idxzbr5fdq3i2dlfgihsac9jj7whj0gd902nh";
+  })
+  (fetchNuGet {
+    pname = "QuikGraph";
+    version = "2.5.0";
+    sha256 = "0xjg7pxmmz5a1mmsxlpgbl6la4wrrjmpdijhjwqi42v88yqr4gd7";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.Globalization";
+    version = "4.3.0";
+    sha256 = "1daqf33hssad94lamzg01y49xwndy2q97i2lrb7mgn28656qia1x";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.IO";
+    version = "4.3.0";
+    sha256 = "0l8xz8zn46w4d10bcn3l4yyn4vhb3lrj2zw8llvz7jk14k4zps5x";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.Reflection";
+    version = "4.3.0";
+    sha256 = "02c9h3y35pylc0zfq3wcsvc5nqci95nrkq0mszifc0sjx7xrzkly";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.Reflection.Primitives";
+    version = "4.3.0";
+    sha256 = "0x1mm8c6iy8rlxm8w9vqw7gb7s1ljadrn049fmf70cyh42vdfhrf";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.Resources.ResourceManager";
+    version = "4.3.0";
+    sha256 = "03kickal0iiby82wa5flar18kyv82s9s6d4xhk5h4bi5kfcyfjzl";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.Runtime";
+    version = "4.3.0";
+    sha256 = "1cqh1sv3h5j7ixyb7axxbdkqx6cxy00p4np4j91kpm492rf4s25b";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.Text.Encoding";
+    version = "4.3.0";
+    sha256 = "0aqqi1v4wx51h51mk956y783wzags13wa7mgqyclacmsmpv02ps3";
+  })
+  (fetchNuGet {
+    pname = "runtime.any.System.Threading.Tasks";
+    version = "4.3.0";
+    sha256 = "03mnvkhskbzxddz4hm113zsch1jyzh2cs450dk3rgfjp8crlw1va";
+  })
+  (fetchNuGet {
+    pname = "runtime.debian.8-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "16rnxzpk5dpbbl1x354yrlsbvwylrq456xzpsha1n9y3glnhyx9d";
+  })
+  (fetchNuGet {
+    pname = "runtime.fedora.23-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "0hkg03sgm2wyq8nqk6dbm9jh5vcq57ry42lkqdmfklrw89lsmr59";
+  })
+  (fetchNuGet {
+    pname = "runtime.fedora.24-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "0c2p354hjx58xhhz7wv6div8xpi90sc6ibdm40qin21bvi7ymcaa";
+  })
+  (fetchNuGet {
+    pname = "runtime.native.System";
+    version = "4.3.0";
+    sha256 = "15hgf6zaq9b8br2wi1i3x0zvmk410nlmsmva9p0bbg73v6hml5k4";
+  })
+  (fetchNuGet {
+    pname = "runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "18pzfdlwsg2nb1jjjjzyb5qlgy6xjxzmhnfaijq5s2jw3cm3ab97";
+  })
+  (fetchNuGet {
+    pname = "runtime.opensuse.13.2-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "0qyynf9nz5i7pc26cwhgi8j62ps27sqmf78ijcfgzab50z9g8ay3";
+  })
+  (fetchNuGet {
+    pname = "runtime.opensuse.42.1-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "1klrs545awhayryma6l7g2pvnp9xy4z0r1i40r80zb45q3i9nbyf";
+  })
+  (fetchNuGet {
+    pname = "runtime.osx.10.10-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "0zcxjv5pckplvkg0r6mw3asggm7aqzbdjimhvsasb0cgm59x09l3";
+  })
+  (fetchNuGet {
+    pname = "runtime.rhel.7-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "0vhynn79ih7hw7cwjazn87rm9z9fj0rvxgzlab36jybgcpcgphsn";
+  })
+  (fetchNuGet {
+    pname = "runtime.ubuntu.14.04-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "160p68l2c7cqmyqjwxydcvgw7lvl1cr0znkw8fp24d1by9mqc8p3";
+  })
+  (fetchNuGet {
+    pname = "runtime.ubuntu.16.04-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "15zrc8fgd8zx28hdghcj5f5i34wf3l6bq5177075m2bc2j34jrqy";
+  })
+  (fetchNuGet {
+    pname = "runtime.ubuntu.16.10-x64.runtime.native.System.Security.Cryptography.OpenSsl";
+    version = "4.3.0";
+    sha256 = "1p4dgxax6p7rlgj4q73k73rslcnz4wdcv8q2flg1s8ygwcm58ld5";
+  })
+  (fetchNuGet {
+    pname = "runtime.unix.System.Private.Uri";
+    version = "4.3.0";
+    sha256 = "1jx02q6kiwlvfksq1q9qr17fj78y5v6mwsszav4qcz9z25d5g6vk";
+  })
+  (fetchNuGet {
+    pname = "runtime.unix.System.Runtime.Extensions";
+    version = "4.3.0";
+    sha256 = "0pnxxmm8whx38dp6yvwgmh22smknxmqs5n513fc7m4wxvs1bvi4p";
+  })
+  (fetchNuGet {
+    pname = "Symbolism";
+    version = "1.0.4";
+    sha256 = "0da9g424x043bbd4pbgj7rsnpyvlbfmvxkyny7b3xd9smjx3dpr5";
+  })
+  (fetchNuGet {
+    pname = "System.Globalization";
+    version = "4.3.0";
+    sha256 = "1cp68vv683n6ic2zqh2s1fn4c2sd87g5hpp6l4d4nj4536jz98ki";
+  })
+  (fetchNuGet {
+    pname = "System.IO";
+    version = "4.3.0";
+    sha256 = "05l9qdrzhm4s5dixmx68kxwif4l99ll5gqmh7rqgw554fx0agv5f";
+  })
+  (fetchNuGet {
+    pname = "System.Private.Uri";
+    version = "4.3.0";
+    sha256 = "04r1lkdnsznin0fj4ya1zikxiqr0h6r6a1ww2dsm60gqhdrf0mvx";
+  })
+  (fetchNuGet {
+    pname = "System.Reflection";
+    version = "4.3.0";
+    sha256 = "0xl55k0mw8cd8ra6dxzh974nxif58s3k1rjv1vbd7gjbjr39j11m";
+  })
+  (fetchNuGet {
+    pname = "System.Reflection.Primitives";
+    version = "4.3.0";
+    sha256 = "04xqa33bld78yv5r93a8n76shvc8wwcdgr1qvvjh959g3rc31276";
+  })
+  (fetchNuGet {
+    pname = "System.Resources.ResourceManager";
+    version = "4.3.0";
+    sha256 = "0sjqlzsryb0mg4y4xzf35xi523s4is4hz9q4qgdvlvgivl7qxn49";
+  })
+  (fetchNuGet {
+    pname = "System.Runtime";
+    version = "4.3.0";
+    sha256 = "066ixvgbf2c929kgknshcxqj6539ax7b9m570cp8n179cpfkapz7";
+  })
+  (fetchNuGet {
+    pname = "System.Runtime.Extensions";
+    version = "4.3.0";
+    sha256 = "1ykp3dnhwvm48nap8q23893hagf665k0kn3cbgsqpwzbijdcgc60";
+  })
+  (fetchNuGet {
+    pname = "System.Runtime.Numerics";
+    version = "4.3.0";
+    sha256 = "19rav39sr5dky7afygh309qamqqmi9kcwvz3i0c5700v0c5cg61z";
+  })
+  (fetchNuGet {
+    pname = "System.Text.Encoding";
+    version = "4.3.0";
+    sha256 = "1f04lkir4iladpp51sdgmis9dj4y8v08cka0mbmsy0frc9a4gjqr";
+  })
+  (fetchNuGet {
+    pname = "System.Threading.Tasks";
+    version = "4.3.0";
+    sha256 = "134z3v9abw3a6jsw17xl3f6hqjpak5l682k2vz39spj4kmydg6k7";
+  })
+]