From b051a144dc42449c723ca188e65f58d159ebb0ee Mon Sep 17 00:00:00 2001
From: "Adam C. Stephens" <adam@valkor.net>
Date: Wed, 23 Jul 2025 13:00:55 -0400
Subject: [PATCH] elixir-ls: force local installation

---
 pkgs/development/beam-modules/default.nix     |  2 +-
 .../beam-modules/elixir-ls/default.nix        | 44 +++++++------------
 .../beam-modules/elixir-ls/launch.sh.patch    |  8 ++--
 3 files changed, 20 insertions(+), 34 deletions(-)

diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index 486d91a5ab06..8b04fe8a07a7 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -89,7 +89,7 @@ let
         inherit fetchMixDeps mixRelease;
       };
 
-      elixir-ls = callPackage ./elixir-ls { inherit elixir fetchMixDeps mixRelease; };
+      elixir-ls = callPackage ./elixir-ls { inherit elixir; };
 
       lfe = lfe_2_1;
       lfe_2_1 = lib'.callLFE ../interpreters/lfe/2.1.nix { inherit erlang buildRebar3 buildHex; };
diff --git a/pkgs/development/beam-modules/elixir-ls/default.nix b/pkgs/development/beam-modules/elixir-ls/default.nix
index 237838bc337b..eda8502395ad 100644
--- a/pkgs/development/beam-modules/elixir-ls/default.nix
+++ b/pkgs/development/beam-modules/elixir-ls/default.nix
@@ -3,13 +3,12 @@
   elixir,
   fetchpatch,
   fetchFromGitHub,
-  fetchMixDeps,
   makeWrapper,
-  mixRelease,
+  stdenv,
   nix-update-script,
 }:
 
-mixRelease rec {
+stdenv.mkDerivation rec {
   pname = "elixir-ls";
   version = "0.28.1";
 
@@ -20,16 +19,6 @@ mixRelease rec {
     hash = "sha256-r4P+3MPniDNdF3SG2jfBbzHsoxn826eYd2tsv6bJBoI=";
   };
 
-  inherit elixir;
-
-  stripDebug = true;
-
-  mixFodDeps = fetchMixDeps {
-    pname = "mix-deps-${pname}";
-    inherit src version elixir;
-    hash = "sha256-8zs+99jwf+YX5SwD65FCPmfrYhTCx4AQGCGsDeCKxKc=";
-  };
-
   patches = [
     # fix elixir deterministic support https://github.com/elixir-lsp/elixir-ls/pull/1216
     # remove > 0.28.1
@@ -46,28 +35,25 @@ mixRelease rec {
     makeWrapper
   ];
 
-  # elixir-ls require a special step for release
-  # compile and release need to be performed together because
-  # of the no-deps-check requirement
-  buildPhase = ''
-    runHook preBuild
+  # for substitution
+  env.elixir = elixir;
 
-    mix do compile --no-deps-check, elixir_ls.release${lib.optionalString (lib.versionAtLeast elixir.version "1.16.0") "2"}
-
-    runHook postBuild
-  '';
+  dontConfigure = true;
+  dontBuild = true;
 
   installPhase = ''
+    cp -R . $out
+    ln -s $out/VERSION $out/scripts/VERSION
+
+    substituteAllInPlace $out/scripts/launch.sh
+
     mkdir -p $out/bin
-    cp -Rv release $out/libexec
 
-    substituteAllInPlace $out/libexec/launch.sh
+    makeWrapper $out/scripts/language_server.sh $out/bin/elixir-ls \
+      --set ELS_LOCAL "1"
 
-    makeWrapper $out/libexec/language_server.sh $out/bin/elixir-ls \
-      --set ELS_INSTALL_PREFIX "$out/libexec"
-
-    makeWrapper $out/libexec/debug_adapter.sh $out/bin/elixir-debug-adapter \
-      --set ELS_INSTALL_PREFIX "$out/libexec"
+    makeWrapper $out/scripts/debug_adapter.sh $out/bin/elixir-debug-adapter \
+      --set ELS_LOCAL "1"
 
     runHook postInstall
   '';
diff --git a/pkgs/development/beam-modules/elixir-ls/launch.sh.patch b/pkgs/development/beam-modules/elixir-ls/launch.sh.patch
index aabfd82a3d58..b497720e4bd9 100644
--- a/pkgs/development/beam-modules/elixir-ls/launch.sh.patch
+++ b/pkgs/development/beam-modules/elixir-ls/launch.sh.patch
@@ -1,6 +1,6 @@
-diff --git i/scripts/launch.sh w/scripts/launch.sh
-index 21afbb1e..975cbdf0 100755
---- i/scripts/launch.sh
+diff --git c/scripts/launch.sh w/scripts/launch.sh
+index 21afbb1e..6b61f0b4 100755
+--- c/scripts/launch.sh
 +++ w/scripts/launch.sh
 @@ -1,125 +1,4 @@
 -#!/bin/sh
@@ -140,7 +140,7 @@ index 21afbb1e..975cbdf0 100755
 -  SCRIPTPATH=${ELS_INSTALL_PREFIX}
 -fi
 +SCRIPT=$(readlink -f "$0")
-+SCRIPTPATH=$(dirname "$SCRIPT")/../libexec
++SCRIPTPATH=$(dirname "$SCRIPT")/../scripts
  
  export MIX_ENV=prod
  # Mix.install prints to stdout and reads from stdin