diff --git a/pkgs/by-name/he/helmholtz/package.nix b/pkgs/by-name/he/helmholtz/package.nix
index ea90db2b4cff..05b797a40ec0 100644
--- a/pkgs/by-name/he/helmholtz/package.nix
+++ b/pkgs/by-name/he/helmholtz/package.nix
@@ -7,7 +7,8 @@
 }:
 
 stdenv.mkDerivation {
-  name = "helmholtz";
+  pname = "helmholtz";
+  version = "1.0";
 
   src = fetchurl {
     url = "https://www.katjaas.nl/helmholtz/helmholtz~.zip";