diff --git a/pkgs/by-name/vi/viceroy/package.nix b/pkgs/by-name/vi/viceroy/package.nix
index adf88f4a2027..732e0721f2ca 100644
--- a/pkgs/by-name/vi/viceroy/package.nix
+++ b/pkgs/by-name/vi/viceroy/package.nix
@@ -18,7 +18,8 @@ rustPlatform.buildRustPackage rec {
   cargoHash = "sha256-PoexldRTp2cPu7iF7te//kO4Ph1P6A/jNZdMkYKERqM=";
 
   cargoTestFlags = [
-    "--package viceroy-lib"
+    "--package"
+    "viceroy-lib"
   ];
 
   meta = {