diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 81364fc13261..a5cfde8a1cfa 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,7 +14,7 @@ jobs:
     - uses: actions/checkout@v3
     - uses: cachix/install-nix-action@v22
       with:
-        nix_path: nixpkgs=channel:nixos-unstable
+        nix_path: nixpkgs=channel:nixpkgs-unstable
     - uses: cachix/cachix-action@v12
       with:
         name: nix-community
@@ -24,7 +24,7 @@ jobs:
           echo "Error: literalExample should be replaced by literalExpression" > /dev/stderr
           exit 1
         fi
-    - run: nix-build --show-trace -A docs.jsonModuleMaintainers
+    - run: nix-build --show-trace -A docs.manPages
     - run: ./format -c
     - run: nix-shell --show-trace . -A install
     - run: nix-shell --show-trace --arg enableBig false --pure tests -A run.all
diff --git a/modules/lib/stdlib-extended.nix b/modules/lib/stdlib-extended.nix
index 3c4e032aa97a..daee442b7d53 100644
--- a/modules/lib/stdlib-extended.nix
+++ b/modules/lib/stdlib-extended.nix
@@ -10,4 +10,5 @@ in nixpkgsLib.extend (self: super: {
   # For forward compatibility.
   literalExpression = super.literalExpression or super.literalExample;
   literalDocBook = super.literalDocBook or super.literalExample;
+  mdDoc = text: { _type = "mdDoc"; inherit text; };
 })