move home-manager nix from ~/.config/nixpkgs to ~/nix

nix/overlays/rfd.nix

@@ -0,0 +1,44 @@
+self: super:
+rec {
+
+  python38 = with super; super.python38.override { };
+
+  pythonPackages = python38.pkgs;
+
+  rfd = with self; pythonPackages.buildPythonApplication rec {
+    pname = "rfd";
+    version = "v0.6.0";
+
+    src = fetchFromGitHub {
+      owner = "davegallant";
+      repo = "rfd";
+      rev = version;
+      hash = "sha256:0cllhbca4dykl6j8snmml4kk6kzamlzhcrdf49f5v0zk7zljgkl1";
+    };
+
+    postPatch = ''
+      substituteInPlace requirements.txt --replace "soupsieve<=2.0" "soupsieve"
+      substituteInPlace requirements.txt --replace "beautifulsoup4<=4.8.2" "beautifulsoup4"
+    '';
+
+    # No tests included
+    doCheck = false;
+
+    propagatedBuildInputs = with pythonPackages; [
+      beautifulsoup4
+      click
+      colorama
+      requests
+      soupsieve
+    ];
+
+    passthru.python3 = python3;
+
+    meta = with super.lib; {
+      homepage = "https://www.redflagdeals.com/";
+      description = "View RedFlagDeals from the command line";
+      license = licenses.asl20;
+      maintainers = [ ];
+    };
+  };
+}