delegate pin management to tack

.tack/pins.toml

@@ -0,0 +1,38 @@
+# tack pins
+# edit by hand or with tack add / rm / alias
+# nix reads pins.lock.json
+# this file drives tack update
+
+# shorturl schemes
+# scheme rest expands rest into {path}
+[shorturls]
+# gh = "github:{path}"
+
+# all_follow maps input names to the top-level pin they follow
+# opt out per-input with exclude_follow
+[all_follow]
+# nixpkgs = "nixpkgs"
+# nixpkgs = ["nixpkgs-stable", "nixpkgs-unstable"]
+
+# inputs.<name> fields
+#   url             required, shorturl ok, ?rev=<sha> pins an exact commit
+#   type            flake (default), fetch, or fixed
+#   flake           legacy false means type = "fetch"
+#   follows         { child = "pin" } override map
+#   exclude_follow  all_follow names to skip
+#   dir             subdir holding flake.nix
+#   submodules      fetch git submodules
+#   unpack          fixed-only tarball or file
+[inputs]
+
+[inputs.nixpkgs]
+url = "https://channels.nixos.org/nixpkgs-unstable/nixexprs.tar.xz"
+
+[inputs.nix-systems]
+url = "github:nix-systems/default-linux"
+
+[inputs.unf]
+url = "git+https://git.atagen.co/atagen/unf"
+
+[inputs.tack]
+url = "github:manic-systems/tack/next"