fix elm-pages and elm-land builds

authored mostly by @domenkozar

pkgs/development/compilers/elm/packages/node/default.nix

@@ -6,6 +6,20 @@ let
     inherit pkgs nodejs;
     inherit (pkgs.stdenv.hostPlatform) system;
   };
+  ESBUILD_BINARY_PATH = lib.getExe (
+      pkgs.esbuild.override {
+        buildGoModule = args: pkgs.buildGoModule (args // rec {
+          version = "0.20.2";
+          src = pkgs.fetchFromGitHub {
+            owner = "evanw";
+            repo = "esbuild";
+            rev = "v${version}";
+            hash = "sha256-h/Vqwax4B4nehRP9TaYbdixAZdb1hx373dNxNHvDrtY=";
+          };
+          vendorHash = "sha256-+BfxCyg0KkDQpHt/wycy/8CTG6YBA/VJvJFhhzUnSiQ=";
+        });
+      }
+    );
 in
 with self; with elmLib; {
   inherit (nodePkgs) elm-live elm-upgrade elm-xref elm-analyse elm-git-install;
@@ -22,6 +36,7 @@ with self; with elmLib; {
       };
     in
     patched.override (old: {
+      inherit ESBUILD_BINARY_PATH;
       preRebuild = (old.preRebuild or "") + ''
         # This should not be needed (thanks to binwrap* being nooped) but for some reason it still needs to be done
         # in case of just this package
@@ -124,6 +139,7 @@ with self; with elmLib; {
       patched = patchNpmElm nodePkgs.elm-land;
     in
     patched.override (old: {
+      inherit ESBUILD_BINARY_PATH;
       meta = with lib; nodePkgs."elm-land".meta // {
         description = "Production-ready framework for building Elm applications";
         homepage = "https://elm.land/";

pkgs/development/compilers/elm/packages/node/elm-pages/default.nix

@@ -1,9 +1,29 @@
 { nodePkgs, pkgs, lib, makeWrapper }:
 
-nodePkgs."elm-pages".overrideAttrs (
+let
+  ESBUILD_BINARY_PATH = lib.getExe (
+      pkgs.esbuild.override {
+        buildGoModule = args: pkgs.buildGoModule (args // rec {
+          version = "0.21.5";
+          src = pkgs.fetchFromGitHub {
+            owner = "evanw";
+            repo = "esbuild";
+            rev = "v${version}";
+            hash = "sha256-FpvXWIlt67G8w3pBKZo/mcp57LunxDmRUaCU/Ne89B8=";
+          };
+          vendorHash = "sha256-+BfxCyg0KkDQpHt/wycy/8CTG6YBA/VJvJFhhzUnSiQ=";
+        });
+      }
+    );
+in nodePkgs."elm-pages".overrideAttrs (
   old: {
+    inherit ESBUILD_BINARY_PATH;
     nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [ makeWrapper old.nodejs.pkgs.node-gyp-build ];
 
+    preRebuild = ''
+      sed -i 's/"esbuild": "0\.19\.12"/"esbuild": "0.21.5"/' package.json
+    '';
+
     # can't use `patches = [ <patch_file> ]` with a nodePkgs derivation;
     # need to patch in one of the build phases instead.
     # see upstream issue https://github.com/dillonkearns/elm-pages/issues/305 for dealing with the read-only problem

pkgs/development/compilers/elm/packages/node/generate-node-packages.sh

@@ -10,3 +10,5 @@ $(nix-build $ROOT -A nodePackages.node2nix --no-out-link)/bin/node2nix \
     -o node-packages.nix \
     -c node-composition.nix \
     --no-copy-node-env -e ../../../../node-packages/node-env.nix
+# well, elm-pages requires two different version of esbuild so we twist it's wrist to only use one
+sed -i 's/sources."esbuild-0.19.12"/sources."esbuild-0.21.5"/' node-packages.nix

pkgs/development/compilers/elm/packages/node/node-composition.nix

@@ -8,7 +8,7 @@ let
   nodeEnv = import ../../../../node-packages/node-env.nix {
     inherit (pkgs) stdenv lib python2 runCommand writeTextFile writeShellScript;
     inherit pkgs nodejs;
-    libtool = if pkgs.stdenv.hostPlatform.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
+    libtool = if pkgs.stdenv.isDarwin then pkgs.cctools or pkgs.darwin.cctools else null;
   };
 in
 import ./node-packages.nix {