diff --git a/pkgs/by-name/gi/git-cinnabar/package.nix b/pkgs/by-name/gi/git-cinnabar/package.nix
index 8cb3f3b54b2e..637d68cf2f9e 100644
--- a/pkgs/by-name/gi/git-cinnabar/package.nix
+++ b/pkgs/by-name/gi/git-cinnabar/package.nix
@@ -41,7 +41,7 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-IVizzc2dKZ83dz3KBMDDiaFNdnS40cS++k8AywyvakQ=";
   };
 
-  ZSTD_SYS_USE_PKG_CONFIG = true;
+  env.ZSTD_SYS_USE_PKG_CONFIG = true;
 
   enableParallelBuilding = true;