diff --git a/pkgs/development/pharo/launcher/default.nix b/pkgs/development/pharo/launcher/default.nix
index 9cec6e81ae62..8282c38a1e7f 100644
--- a/pkgs/development/pharo/launcher/default.nix
+++ b/pkgs/development/pharo/launcher/default.nix
@@ -51,7 +51,7 @@ stdenv.mkDerivation rec {
      secs=5
      echo -n "Running headless Pharo for $secs seconds to check for a crash... "
      timeout $secs \
-       "${pharo}/bin/pharo" -nodisplay PharoLauncher.image --no-quit eval 'true'
+       "${pharo}/bin/pharo" --nodisplay PharoLauncher.image --no-quit eval 'true'
      test "$?" == 124 && echo "ok")
   '';