diff --git a/pkgs/servers/sql/postgresql/ext/plpython3.nix b/pkgs/servers/sql/postgresql/ext/plpython3.nix
index 01cbde394fbc..b9e6824c8658 100644
--- a/pkgs/servers/sql/postgresql/ext/plpython3.nix
+++ b/pkgs/servers/sql/postgresql/ext/plpython3.nix
@@ -11,7 +11,8 @@ let
     let
       python = python3.withPackages f;
       finalPackage = buildEnv {
-        name = "${postgresql.pname}-plpython3-${postgresql.version}";
+        pname = "${postgresql.pname}-plpython3";
+        inherit (postgresql) version;
         paths = [ postgresql.plpython3 ];
         passthru = {
           inherit withPackages;