diff --git a/.github/workflows/build_nix.yml b/.github/workflows/build_nix.yml
index 70425c8..4ccbf92 100644
--- a/.github/workflows/build_nix.yml
+++ b/.github/workflows/build_nix.yml
@@ -1,7 +1,8 @@
 name: "Build legacy Nix package on Ubuntu"
 
 on:
-  push:
+  check_run:
+    types: [ requested_action ]
 
 jobs:
   build:
diff --git a/flake.nix b/flake.nix
index 4fbbfca..624590d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -57,7 +57,7 @@
 
             src = self;
 
-            nativeBuildInputs = with pkgs; [ pkg-config ];
+            nativeBuildInputs = with pkgs; [ pkg-config shaderc ];
             buildInputs = libs;
 
             cargoLock = {