diff --git a/pkgs/by-name/pn/pngcheck/package.nix b/pkgs/by-name/pn/pngcheck/package.nix
index 25f0e50bccf6..3d41663e4347 100644
--- a/pkgs/by-name/pn/pngcheck/package.nix
+++ b/pkgs/by-name/pn/pngcheck/package.nix
@@ -23,7 +23,6 @@ stdenv.mkDerivation (finalAttrs: {
   '';
 
   makefile = "Makefile.unx";
-  makeFlags = [ "ZPATH=${zlib.static}/lib" ];
 
   nativeBuildInputs = [ installShellFiles ];