diff --git a/pkgs/by-name/go/gotify-server/ui.nix b/pkgs/by-name/go/gotify-server/ui.nix
index 432aeedafd601..a6b5bfc923246 100644
--- a/pkgs/by-name/go/gotify-server/ui.nix
+++ b/pkgs/by-name/go/gotify-server/ui.nix
@@ -26,6 +26,7 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   env.NODE_OPTIONS = "--openssl-legacy-provider";
+  env.FOO = "BAR";
 
   installPhase = ''
     runHook preInstall
diff --git a/pkgs/development/python-modules/units-llnl/default.nix b/pkgs/development/python-modules/units-llnl/default.nix
index 03d0cfda1515f..645a1d160156b 100644
--- a/pkgs/development/python-modules/units-llnl/default.nix
+++ b/pkgs/development/python-modules/units-llnl/default.nix
@@ -37,6 +37,7 @@ buildPythonPackage {
   ];
   dontUseCmakeConfigure = true;
   env = {
+    FOO = "BAR";
     SKBUILD_CMAKE_ARGS = lib.strings.concatStringsSep ";" (
       cmakeFlags
       ++ [