diff --git a/pkgs/pkgs-lib/tests/formats.nix b/pkgs/pkgs-lib/tests/formats.nix index 3e52f74989d..16b760a5ada 100644 --- a/pkgs/pkgs-lib/tests/formats.nix +++ b/pkgs/pkgs-lib/tests/formats.nix @@ -15,11 +15,11 @@ let in formatSet.generate "test-format-file" config; runBuildTest = name: { drv, expected }: pkgs.runCommandNoCC name {} '' - if diff ${drv} ${builtins.toFile "expected" expected}; then - touch $out + if diff -u '${builtins.toFile "expected" expected}' '${drv}'; then + touch "$out" else - echo "Got: $(cat ${drv})" - echo "Should be: ${expected}" + echo + echo "Got different values than expected; diff above." exit 1 fi '';