diff --git a/pkgs/by-name/gh/ghdl/package.nix b/pkgs/by-name/gh/ghdl/package.nix
index 90f62294bad8..3d9943397e0b 100644
--- a/pkgs/by-name/gh/ghdl/package.nix
+++ b/pkgs/by-name/gh/ghdl/package.nix
@@ -30,7 +30,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-vPeODNTptxIjN6qLoIHaKOFf3P3iAK2GloVreHPaAz8=";
   };
 
-  LIBRARY_PATH = "${stdenv.cc.libc}/lib";
+  env.LIBRARY_PATH = "${stdenv.cc.libc}/lib";
 
   nativeBuildInputs = [
     gnat