significantly improve purity

modules-package.nix

@@ -0,0 +1,61 @@
+{
+	lib,
+	stdenvNoCC,
+	callPackage,
+}: let
+	stdenv = stdenvNoCC;
+in stdenv.mkDerivation (self: {
+	name = "dynix-modules";
+
+	strictDeps = true;
+	__structuredAttrs = true;
+
+	outputs = [ "out" "modules" ];
+
+	src = lib.fileset.toSource {
+		root = ./modules/dynamicism;
+		fileset = lib.fileset.unions [
+			./modules/dynamicism
+		];
+	};
+
+	phases = [ "unpackPhase" "patchPhase" "installPhase "];
+
+	installPhase = lib.dedent ''
+		mkdir -vp "$out"
+		cp -rv * "$out/"
+
+		#mkdir -vp "$modules/share/nix/modules/dynix"
+		#cp --reflink=auto -rv * "$modules/share/nix/modules/dynix/"
+
+		mkdir -vp "$modules/share/nixos/modules/dynix"
+		cp --reflink=auto -rv * "$modules/share/nixos/modules/dynix/"
+	'';
+
+	passthru.mkDevShell = {
+		path,
+		mkShell,
+		python3Packages,
+	}: let
+		mkShell' = mkShell.override { inherit stdenv; };
+		pyEnv = python3Packages.python.withPackages (p: [
+			p.beartype
+		]);
+	in mkShell' {
+		name = "devshell-for-${self.finalPackage.name}";
+		packages = [ pyEnv ];
+		env.PYTHONPATH = [
+			"${pyEnv}/${pyEnv.sitePackages}"
+			# Cursed.
+			"${path}/nixos/lib/test-driver/src"
+		] |> lib.concatStringsSep ":";
+	};
+
+	passthru.tests = lib.fix (callPackage ./tests {
+		dynix = self.finalPackage;
+	}).packages;
+
+	meta = {
+		outputsToInstall = [ "modules" ];
+	};
+})