From aca0d40720e63a0089d0f7744da56f599ebd314e Mon Sep 17 00:00:00 2001
From: Benjamin Saunders <ben.e.saunders@gmail.com>
Date: Sat, 31 Dec 2022 15:39:49 -0800
Subject: [PATCH] libplacebo: remove redundant glslang dependency

src/glsl/meson.build says: "we only need one or the other, and shaderc
is preferred". Reduces fragility due to glslang updates.
---
 pkgs/development/libraries/libplacebo/default.nix | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/pkgs/development/libraries/libplacebo/default.nix b/pkgs/development/libraries/libplacebo/default.nix
index 73d97a476559..754ac2097b95 100644
--- a/pkgs/development/libraries/libplacebo/default.nix
+++ b/pkgs/development/libraries/libplacebo/default.nix
@@ -7,7 +7,6 @@
 , vulkan-headers
 , vulkan-loader
 , shaderc
-, glslang
 , lcms2
 , libepoxy
 , libGL
@@ -38,7 +37,6 @@ stdenv.mkDerivation rec {
     vulkan-headers
     vulkan-loader
     shaderc
-    glslang
     lcms2
     libepoxy
     libGL
@@ -50,6 +48,7 @@ stdenv.mkDerivation rec {
     "-Dvulkan-registry=${vulkan-headers}/share/vulkan/registry/vk.xml"
     "-Ddemos=false" # Don't build and install the demo programs
     "-Dd3d11=disabled" # Disable the Direct3D 11 based renderer
+    "-Dglslang=disabled" # rely on shaderc for GLSL compilation instead
   ] ++ lib.optionals stdenv.isDarwin [
     "-Dunwind=disabled" # libplacebo doesn’t build with `darwin.libunwind`
   ];