diff --git a/.gitignore b/.gitignore
index 3ec510d..20c60d7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
 /build
-/lean_packages/*
-!/lean_packages/manifest.json
+/lake-packages/*
diff --git a/DocGen4/Load.lean b/DocGen4/Load.lean
index 07b4d97..fc2ef09 100644
--- a/DocGen4/Load.lean
+++ b/DocGen4/Load.lean
@@ -13,7 +13,6 @@ import Lean.Data.HashMap
 namespace DocGen4
 
 open Lean System IO
-
 /--
 Sets up a lake workspace for the current project. Furthermore initialize
 the Lean search path with the path to the proper compiler from lean-toolchain
@@ -21,7 +20,8 @@ as well as all the dependencies.
 -/
 def lakeSetup : IO (Except UInt32 Lake.Workspace) := do
   let (leanInstall?, lakeInstall?) ← Lake.findInstall?
-  match ←(EIO.toIO' <| Lake.mkLoadConfig {leanInstall?, lakeInstall?}) with
+  let config := Lake.mkLoadConfig.{0} {leanInstall?, lakeInstall?}
+  match ←(EIO.toIO' config) with
   | .ok config =>
     let ws : Lake.Workspace ← Lake.loadWorkspace config
       |>.run Lake.MonadLog.eio
diff --git a/DocGen4/Output/SourceLinker.lean b/DocGen4/Output/SourceLinker.lean
index dd3ba56..30c0657 100644
--- a/DocGen4/Output/SourceLinker.lean
+++ b/DocGen4/Output/SourceLinker.lean
@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Henrik Böving
 -/
 import Lean
-import Lake
+import Lake.Load
 
 namespace DocGen4.Output
 
@@ -65,8 +65,8 @@ def sourceLinker (ws : Lake.Workspace) : IO (Name → Option DeclarationRange 
       |>.run (Lake.MonadLog.eio .normal)
       |>.toIO (λ _ => IO.userError "Failed to load lake manifest")
   for pkg in manifest.toArray do
-    let value := (getGithubBaseUrl pkg.url, pkg.rev)
-    gitMap := gitMap.insert pkg.name value
+    if let  .git _ url rev .. := pkg then
+      gitMap := gitMap.insert pkg.name (getGithubBaseUrl url, rev)
 
   pure λ module range =>
     let parts := module.components.map Name.toString
diff --git a/lake-manifest.json b/lake-manifest.json
new file mode 100644
index 0000000..b546371
--- /dev/null
+++ b/lake-manifest.json
@@ -0,0 +1,32 @@
+{"version": 3,
+ "packages":
+ [{"git":
+   {"url": "https://github.com/mhuisi/lean4-cli",
+    "subDir?": null,
+    "rev": "5a858c32963b6b19be0d477a30a1f4b6c120be7e",
+    "name": "Cli",
+    "inputRev?": "nightly"}},
+  {"git":
+   {"url": "https://github.com/hargonix/LeanInk",
+    "subDir?": null,
+    "rev": "9f3101452135964ac9107ec8e9910bfd14022bbc",
+    "name": "leanInk",
+    "inputRev?": "doc-gen"}},
+  {"git":
+   {"url": "https://github.com/xubaiw/Unicode.lean",
+    "subDir?": null,
+    "rev": "6dd6ae3a3839c8350a91876b090eda85cf538d1d",
+    "name": "Unicode",
+    "inputRev?": "main"}},
+  {"git":
+   {"url": "https://github.com/leanprover/lake",
+    "subDir?": null,
+    "rev": "051cf403f12da80a44802810d9098f2bbed61d93",
+    "name": "lake",
+    "inputRev?": "master"}},
+  {"git":
+   {"url": "https://github.com/xubaiw/CMark.lean",
+    "subDir?": null,
+    "rev": "2cc7cdeef67184f84db6731450e4c2b258c28fe8",
+    "name": "CMark",
+    "inputRev?": "main"}}]}
diff --git a/lean-toolchain b/lean-toolchain
index 042d8d2..a287eeb 100644
--- a/lean-toolchain
+++ b/lean-toolchain
@@ -1 +1 @@
-leanprover/lean4:nightly-2022-11-21
+leanprover/lean4:nightly-2022-11-30
diff --git a/lean_packages/manifest.json b/lean_packages/manifest.json
deleted file mode 100644
index 7a6d443..0000000
--- a/lean_packages/manifest.json
+++ /dev/null
@@ -1,22 +0,0 @@
-{"version": 2,
- "packages":
- [{"url": "https://github.com/mhuisi/lean4-cli",
-   "rev": "5a858c32963b6b19be0d477a30a1f4b6c120be7e",
-   "name": "Cli",
-   "inputRev": "nightly"},
-  {"url": "https://github.com/hargonix/LeanInk",
-   "rev": "9f3101452135964ac9107ec8e9910bfd14022bbc",
-   "name": "leanInk",
-   "inputRev": "doc-gen"},
-  {"url": "https://github.com/xubaiw/Unicode.lean",
-   "rev": "6dd6ae3a3839c8350a91876b090eda85cf538d1d",
-   "name": "Unicode",
-   "inputRev": "main"},
-  {"url": "https://github.com/leanprover/lake",
-   "rev": "004034496ef84b21976a940edc65f335340bd2ec",
-   "name": "lake",
-   "inputRev": "master"},
-  {"url": "https://github.com/xubaiw/CMark.lean",
-   "rev": "2cc7cdeef67184f84db6731450e4c2b258c28fe8",
-   "name": "CMark",
-   "inputRev": "main"}]}