diff --git a/flake.nix b/flake.nix
index 8a557af..90d8ab6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -48,8 +48,8 @@
             fi
 
             # Prompt tweak so you can see when venv is active
-            export PS1="(SPARC-venv) $PS1"
+            export NIX_PROJECT_SHELL="SPARC"
           '';
         };
       });
-}
\ No newline at end of file
+}