good practice

e-valuation · Nov 25, 2024 · 33c0a0f · 33c0a0f
1 parent b3ff6ef
commit 33c0a0f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/flake.nix b/flake.nix
@@ -43,7 +43,7 @@
             dependency-groups = lib.optionals (!pkgs.stdenv.isDarwin) [ "psycopg-binary" ];
             workspaceRoot = ./.;
           };
-          evap-dev = evap.override (prev: { dependency-groups = prev.dependency-groups ++ [ "dev" ]; });
+          evap-dev = evap.override (prev: { dependency-groups = (prev.dependency-groups or [ ]) ++ [ "dev" ]; });
           default = evap-dev;
 
           impure = pkgs.mkShell {