From 5c3070a693fc1d00e1b16187a2040a48c3087e3a Mon Sep 17 00:00:00 2001
From: Ellie Hermaszewska <git@monoid.al>
Date: Fri, 10 Feb 2023 10:17:56 +0800
Subject: [PATCH] vulkan-validation-layers: Fix path to layer binary in layer
 description

Fixes https://github.com/NixOS/nixpkgs/issues/215607

This solution (rather than patching the cmake source) is in line with how the other vulkan layer packages do things
---
 .../tools/vulkan-validation-layers/default.nix  | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/pkgs/development/tools/vulkan-validation-layers/default.nix b/pkgs/development/tools/vulkan-validation-layers/default.nix
index 17e898301956..efc161095580 100644
--- a/pkgs/development/tools/vulkan-validation-layers/default.nix
+++ b/pkgs/development/tools/vulkan-validation-layers/default.nix
@@ -4,6 +4,7 @@
 , fetchFromGitHub
 , cmake
 , pkg-config
+, jq
 , glslang
 , libffi
 , libX11
@@ -37,15 +38,10 @@ stdenv.mkDerivation rec {
       hash = "sha256-+VbiXtxzYaF5o+wIrJ+09LmgBdaLv/0VJGFDnBkrXms=";
     });
 
-  # Include absolute paths to layer libraries in their associated
-  # layer definition json files.
-  postPatch = ''
-    sed "s|\([[:space:]]*set(INSTALL_DEFINES \''${INSTALL_DEFINES} -DRELATIVE_LAYER_BINARY=\"\)\(\$<TARGET_FILE_NAME:\''${TARGET_NAME}>\")\)|\1$out/lib/\2|" -i layers/CMakeLists.txt
-  '';
-
   nativeBuildInputs = [
     cmake
     pkg-config
+    jq
   ];
 
   buildInputs = [
@@ -74,6 +70,15 @@ stdenv.mkDerivation rec {
   # available in Nix sandbox. Fails with VK_ERROR_INCOMPATIBLE_DRIVER.
   doCheck = false;
 
+  # Include absolute paths to layer libraries in their associated
+  # layer definition json files.
+  preFixup = ''
+    for f in "$out"/share/vulkan/explicit_layer.d/*.json "$out"/share/vulkan/implicit_layer.d/*.json; do
+      jq <"$f" >tmp.json ".layer.library_path = \"$out/lib/\" + .layer.library_path"
+      mv tmp.json "$f"
+    done
+  '';
+
   meta = with lib; {
     description = "The official Khronos Vulkan validation layers";
     homepage    = "https://github.com/KhronosGroup/Vulkan-ValidationLayers";