nixbang: add expession

pkgs/development/tools/misc/nixbang/default.nix

@@ -0,0 +1,20 @@
+{ lib, pythonPackages, fetchgit }:
+
+let version = "0.1.1"; in
+pythonPackages.buildPythonPackage {
+  name = "nixbang-${version}";
+  namePrefix = "";
+
+  src = fetchgit {
+    url = "git://github.com/madjar/nixbang.git";
+    rev = "refs/tags/${version}";
+    sha256 = "1n8jq32r2lzk3g0d95ksfq7vdqciz34jabribrr4hcnz4nlijshf";
+  };
+
+  meta = {
+    homepage = https://github.com/madjar/nixbang;
+    description = "A special shebang to run scripts in a nix-shell";
+    maintainers = [ lib.maintainers.madjar ];
+    platforms = lib.platforms.all;
+  };
+}