flake: also provide proper version info for lib's flake

This effectively means that

    nixpkgs$ nix eval ./lib#lib.trivial.version
    "23.11.20231020.ee0d6b5"

now gives meaningful results as well.

See https://github.com/NixOS/nixpkgs/pull/257100#discussion_r1352075369
for the discussion around this.

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/flake.nix b/lib/flake.nix
index 0b5e54d547c50..475aa13edafb8 100644
--- a/lib/flake.nix
+++ b/lib/flake.nix
@@ -1,5 +1,10 @@
 {
   description = "Library of low-level helper functions for nix expressions.";
 
-  outputs = { self }: { lib = import ./.; };
+  outputs = { self }:
+    let
+      lib' = import ./.;
+    in {
+      lib = lib'.extend (import ./__flake-version-info.nix self);
+    };
 }