diff --git a/pkgs/by-name/wk/wkhtmltopdf/package.nix b/pkgs/by-name/wk/wkhtmltopdf/package.nix
index 28c9e3f58362..be0d0620fb47 100644
--- a/pkgs/by-name/wk/wkhtmltopdf/package.nix
+++ b/pkgs/by-name/wk/wkhtmltopdf/package.nix
@@ -94,6 +94,8 @@ in
 stdenv.mkDerivation (
   {
     pname = "wkhtmltopdf";
+    # required to fix eval when it's not overridden by platform below
+    version = "none";
 
     dontStrip = true;