From be0e76426be1153bfae52033f7da9bd7f6dcb107 Mon Sep 17 00:00:00 2001
From: Jade Lovelace <lix@jade.fyi>
Date: Thu, 7 Mar 2024 11:45:59 -0800
Subject: [PATCH] fix nix-doc

---
 flake.nix   | 1 +
 overlay.nix | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/flake.nix b/flake.nix
index bc89060..d241f95 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,5 +20,6 @@
     {
       inherit pkgs;
       packages.default = pkgs.nixVersions.nix_2_18;
+      packages.nix-doc = pkgs.nix-doc;
     });
 }
diff --git a/overlay.nix b/overlay.nix
index 72b928f..9e517d1 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -26,4 +26,9 @@ in
     });
     stable = nix_2_18;
   };
+
+  nix-doc = prev.nix-doc.overrideAttrs (old: {
+    # for the purposes of nix C++ API for nix-doc, lix is Nix 2.20
+    NIX_CFLAGS_COMPILE = [ "-DNIX_2_20_0" ];
+  });
 }