Expose pythonEnv from flake

.gitignore

@@ -159,6 +159,8 @@ cython_debug/
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
 
+venv
+
 # nixos-shell
 nixos.qcow2
 

Makefile

@@ -3,6 +3,9 @@
 help: ## display this help
 	@awk 'BEGIN{FS = ":.*##"; printf "\033[1m\nUsage\n \033[1;92m make\033[0;36m <target>\033[0m\n"} /^[a-zA-Z0-9_-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } ' $(MAKEFILE_LIST)
 
+venv: ## link the python dev environment to ./venv
+	nix build .#pythonEnv -o venv
+
 lint: ## run linters
 	nix fmt
 	black **/*.py

flake.nix

@@ -23,6 +23,14 @@
     let
       inherit (nixpkgs.lib) makeOverridable nixosSystem;
       system = "x86_64-linux";
+      pkgs = nixpkgs.legacyPackages.${system};
+      pythonEnv = pkgs.python3.withPackages (
+        pypkgs: with pypkgs; [
+          flask
+          black
+          pytest
+        ]
+      );
     in
     {
       formatter.${system} = nixpkgs.legacyPackages.${system}.nixfmt-rfc-style;
@@ -39,21 +47,11 @@
         {
           default = self.packages.${system}.intake;
           inherit (pkgs) intake;
+          inherit pythonEnv;
         };
 
       devShells.${system} = {
-        default =
-          let
-            pkgs = nixpkgs.legacyPackages.${system};
-            pythonEnv = pkgs.python3.withPackages (
-              pypkgs: with pypkgs; [
-                flask
-                black
-                pytest
-              ]
-            );
-          in
-          pkgs.mkShell {
+        default = pkgs.mkShell {
           packages = [
             pythonEnv
             pkgs.gnumake