This seems to be one way to go about it

common/base-packages.nix

@@ -2,6 +2,7 @@
   nix-index
   home-manager
   nil
+  nvfetcher
 
   gcc
   git

home/modules/bash-config/default.nix

@@ -12,11 +12,9 @@ let
   #   '';
   # };
 
-  bash-drv = builtins.fetchGit {
-    url = "https://github.com/pestctrl/bash-config";
-    ref = "master";
-    rev = "f88071e92523a271dd553a20e60c8afaaf2dae0b";
-  };
+  bash-drv = (import ../../nvfetch/_sources/generated.nix {
+    inherit (pkgs) fetchurl fetchgit fetchFromGitHub dockerTools;
+  }).bash-config.src;
 in
 {
   options = {

home/nvfetch/_sources/generated.json

@@ -0,0 +1,22 @@
+{
+    "bash-config": {
+        "cargoLocks": null,
+        "date": "2024-07-13",
+        "extract": null,
+        "name": "bash-config",
+        "passthru": null,
+        "pinned": false,
+        "src": {
+            "deepClone": false,
+            "fetchSubmodules": false,
+            "leaveDotGit": false,
+            "name": null,
+            "owner": "pestctrl",
+            "repo": "bash-config",
+            "rev": "f88071e92523a271dd553a20e60c8afaaf2dae0b",
+            "sha256": "sha256-+gQ28icbsv2+Jmxvm02OYWKCuFqtUoAdjDmWt3YgjKI=",
+            "type": "github"
+        },
+        "version": "f88071e92523a271dd553a20e60c8afaaf2dae0b"
+    }
+}

home/nvfetch/_sources/generated.nix

@@ -0,0 +1,16 @@
+# This file was generated by nvfetcher, please do not modify it manually.
+{ fetchgit, fetchurl, fetchFromGitHub, dockerTools }:
+{
+  bash-config = {
+    pname = "bash-config";
+    version = "f88071e92523a271dd553a20e60c8afaaf2dae0b";
+    src = fetchFromGitHub {
+      owner = "pestctrl";
+      repo = "bash-config";
+      rev = "f88071e92523a271dd553a20e60c8afaaf2dae0b";
+      fetchSubmodules = false;
+      sha256 = "sha256-+gQ28icbsv2+Jmxvm02OYWKCuFqtUoAdjDmWt3YgjKI=";
+    };
+    date = "2024-07-13";
+  };
+}

home/nvfetch/nvfetcher.toml

@@ -0,0 +1,5 @@
+[bash-config]
+src.git = "https://github.com/pestctrl/bash-config"
+src.branch = "master"
+# fetch.git = "https://github.com/pestctrl/bash-config"
+fetch.github = "pestctrl/bash-config"