diff --git a/pkgs/development/compilers/purescript/purescript/default.nix b/pkgs/development/compilers/purescript/purescript/default.nix
index 6d7f05ebdae7..fbe96ca179d7 100644
--- a/pkgs/development/compilers/purescript/purescript/default.nix
+++ b/pkgs/development/compilers/purescript/purescript/default.nix
@@ -61,5 +61,6 @@ in stdenv.mkDerivation rec {
     license = licenses.bsd3;
     maintainers = with maintainers; [ justinwoo mbbx6spp cdepillabout ];
     platforms = [ "x86_64-linux" "x86_64-darwin" ];
+    mainProgram = "purs";
   };
 }