Ensure that the manual job gets build with the right revision info

nixos/modules/misc/version.nix

@@ -18,6 +18,12 @@ with pkgs.lib;
       description = "NixOS version suffix.";
     };
 
+    system.nixosRevision = mkOption {
+      internal = true;
+      type = types.uniq types.string;
+      description = "NixOS Git revision hash.";
+    };
+
     system.nixosCodeName = mkOption {
       internal = true;
       type = types.uniq types.string;
@@ -42,6 +48,10 @@ with pkgs.lib;
       let suffixFile = "${toString pkgs.path}/.version-suffix"; in
       mkDefault (if pathExists suffixFile then readFile suffixFile else "pre-git");
 
+    system.nixosRevision =
+      let fn = "${toString pkgs.path}/.git-revision"; in
+      mkDefault (if pathExists fn then readFile fn else "master");
+
     # Note: code names must only increase in alphabetical order.
     system.nixosCodeName = "Aardvark";
 

nixos/modules/services/misc/nixos-manual.nix

@@ -11,12 +11,15 @@ let
 
   cfg = config.services.nixosManual;
 
+  versionModule =
+    { system.nixosVersionSuffix = config.system.nixosVersionSuffix;
+      system.nixosRevision = config.system.nixosRevision;
+    };
+
   manual = import ../../../doc/manual {
     inherit pkgs;
-    revision =
-      let fn = "${toString pkgs.path}/.git-revision";
-      in if pathExists fn then readFile fn else "master";
-    options = (fixMergeModules baseModules
+    revision = config.system.nixosRevision;
+    options = (fixMergeModules ([ versionModule ] ++ baseModules)
       (removeAttrs extraArgs ["config" "options"]) // {
         modules = [ ];
       }).options;

nixos/release.nix

@@ -16,7 +16,9 @@ let
 
 
   versionModule =
-    { system.nixosVersionSuffix = versionSuffix;  };
+    { system.nixosVersionSuffix = versionSuffix;
+      system.nixosRevision = nixpkgs.rev or nixpkgs.shortRev;
+    };
 
 
   makeIso =