diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4aaadcf4feb9..0e99b2fcafb1 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -6506,6 +6506,8 @@ in
   # Nomad never updates major go versions within a release series and is unsupported
   # on Go versions that it did not ship with. Due to historic bugs when compiled
   # with different versions we pin Go for all versions.
+  # Upstream partially documents used Go versions here
+  # https://github.com/hashicorp/nomad/blob/master/contributing/golang.md
   nomad_0_12 = callPackage ../applications/networking/cluster/nomad/0.12.nix {
     buildGoPackage = buildGo114Package;
     inherit (linuxPackages) nvidia_x11;