1 files changed, 20 insertions, 0 deletions
diff --git a/nixpkgs-pin b/nixpkgs-pin
new file mode 100755
index 0000000..bca1dee
--- /dev/null
+++ b/nixpkgs-pin
@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+function usage {
+  echo "usage: nixpkgs-pin <hash>"
+  echo "where <hash> is a git sha from the nixpkgs repo"
+  exit 1
+}
+
+[[ -z $1 ]] && usage
+
+url="https://github.com/NixOS/nixpkgs/archive/$1.tar.gz"
+hash=$(nix-prefetch-url --unpack $url)
+
+cat <<EOF
+# generated with ~/bin/nixpkgs-pin
+{
+  url = "$url";
+  sha256 = "$hash";
+}
+EOF