diff --git a/nix/shell.nix b/nix/shell.nix
index f38c3db25..7ea4a9add 100644
--- a/nix/shell.nix
+++ b/nix/shell.nix
@@ -26,7 +26,12 @@ let
       psycopg = prev.psycopg.overridePythonAttrs (old: {
         buildInputs = old.buildInputs or [ ]
           ++ lib.optionals pkgs.stdenv.isDarwin [ pkgs.openssl ];
+        propagatedBuildInputs = old.propagatedBuildInputs or [ ] ++ [ pkgs.postgresql ];
+      });
+
+      psycopg-c = prev.psycopg-c.overridePythonAttrs (old: {
         nativeBuildInputs = old.nativeBuildInputs or [ ] ++ [ pkgs.postgresql ];
+        propagatedBuildInputs = old.propagatedBuildInputs or [ ] ++ [ final.setuptools ];
       });
     });
     groups = poetry-groups;