diff --git a/pkgs/by-name/fl/fluxcd/package.nix b/pkgs/by-name/fl/fluxcd/package.nix
index c0d0a99cda63..402b3c30a4bd 100644
--- a/pkgs/by-name/fl/fluxcd/package.nix
+++ b/pkgs/by-name/fl/fluxcd/package.nix
@@ -48,7 +48,7 @@ buildGoModule rec {
 
   # Required to workaround test error:
   #   panic: mkdir /homeless-shelter: permission denied
-  HOME = "$TMPDIR";
+  env.HOME = "$TMPDIR";
 
   nativeBuildInputs = [ installShellFiles ];