Use psycopg-c on macos

flake.nix

@@ -35,21 +35,23 @@
       devShells = forAllSystems (system:
         let
           pkgs = pkgsFor.${system};
+          dependency-groups = if pkgs.stdenv.isDarwin then [ "psycopg-c" ] else [ "psycopg-binary" ];
         in
         rec {
           evap = pkgs.callPackage ./nix/shell.nix {
             inherit (self.packages.${system}) python3;
             inherit (inputs) pyproject-nix uv2nix pyproject-build-systems;
-            dependency-groups = lib.optionals (!pkgs.stdenv.isDarwin) [ "psycopg-binary" ];
+            inherit dependency-groups;
             workspaceRoot = ./.;
           };
           evap-dev = evap.override (prev: { dependency-groups = (prev.dependency-groups or [ ]) ++ [ "dev" ]; });
           default = evap-dev;
 
           impure = pkgs.mkShell {
-            packages = [
-              pkgs.python310
-              pkgs.uv
+            packages = with pkgs; [
+              (self.packages.${system}.python3)
+              uv
+              postgresql
             ];
             shellHook = ''
               unset PYTHONPATH

nix/shell.nix

@@ -16,8 +16,13 @@ let
 
   workspace = uv2nix.lib.workspace.loadWorkspace { inherit workspaceRoot; };
   overlay = workspace.mkPyprojectOverlay { sourcePreference = "wheel"; };
+  package-overrides = final: prev: {
+    psycopg-c = prev.psycopg-c.overrideAttrs (old: {
+      nativeBuildInputs = (old.nativeBuildInputs or [ ]) ++ [ final.setuptools pkgs.postgresql ];
+    });
+  };
   baseSet = pkgs.callPackage pyproject-nix.build.packages { python = python3; };
-  pythonSet = baseSet.overrideScope (lib.composeManyExtensions [ pyproject-build-systems.overlays.default overlay ]);
+  pythonSet = baseSet.overrideScope (lib.composeManyExtensions [ pyproject-build-systems.overlays.default overlay package-overrides ]);
 
   editableOverlay = workspace.mkEditablePyprojectOverlay { root = "$REPO_ROOT"; };
   editablePythonSet = pythonSet.overrideScope editableOverlay;

pyproject.toml

@@ -18,6 +18,7 @@ dependencies = [
 
 [project.optional-dependencies]
 psycopg-binary = ["psycopg[binary]"]
+psycopg-c = ["psycopg[c]"]
 
 [dependency-groups]
 dev = [
@@ -42,6 +43,11 @@ dev = [
 requires = ["hatchling"]
 build-backend = "hatchling.build"
 
+[tool.uv]
+no-binary-package = [
+    "psycopg-c",
+]
+
 ##############################################
 
 [tool.black]