diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 437b47d7..4d5234d6 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -99,9 +99,6 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-
       - name: Install Python
         uses: actions/setup-python@v4
         with:
@@ -119,8 +116,7 @@ jobs:
           # Remove NodeJS, twice to take care of system and locally installed node versions.
           sudo rm -rf $(which node)
           sudo rm -rf $(which node)
-          ls jupyercad-core
-          ls jupyercad-core/dist
+          find . | sed -e "s/[^-][^\/]*\//  |/g" -e "s/|\([^ ]\)/|-\1/"
           cp jupyercad-core/dist/jupytercad*.whl jupyercad-lab/dist/jupytercad*.whl jupyercad-app/dist/jupytercad*.whl .
           python -m pip install "jupyterlab>=4.0.0" jupytercad*.whl
 
diff --git a/packages/opencascade/.gitignore b/packages/opencascade/.gitignore
deleted file mode 100644
index 018d4615..00000000
--- a/packages/opencascade/.gitignore
+++ /dev/null
@@ -1,5 +0,0 @@
-src/*.wasm
-src/*.js
-src/*.d.ts
-src/*.yml
-src/*.version
diff --git a/packages/opencascade/build.yml b/packages/opencascade/build.yml
index 3227eea5..8f828464 100644
--- a/packages/opencascade/build.yml
+++ b/packages/opencascade/build.yml
@@ -84,6 +84,7 @@ mainBuild:
     - symbol: TopoDS_Face
     - symbol: TopoDS_Iterator
     - symbol: TopoDS_Shape
+    - symbol: TopoDS_Shell
     - symbol: TopoDS_Wire
     - symbol: TopTools_IndexedDataMapOfShapeListOfShape
     - symbol: TopTools_IndexedMapOfShape
diff --git a/packages/opencascade/build_opencascade_wasm.js b/packages/opencascade/build_opencascade_wasm.js
index 5fb95ca3..f9e28f06 100644
--- a/packages/opencascade/build_opencascade_wasm.js
+++ b/packages/opencascade/build_opencascade_wasm.js
@@ -11,7 +11,7 @@ const yaml = require('js-yaml');
 const path = require('path');
 
 const IMAGE_NAME = 'donalffons/opencascade.js:2.0.0-beta.b5ff984';
-const OPEN_CASCADE_DIR = 'src';
+const OPEN_CASCADE_DIR = 'lib';
 const VERSION_FILE_NAME = 'jupytercad.opencascade.version';
 const VERSION_FILE_PATH = path.join(OPEN_CASCADE_DIR, VERSION_FILE_NAME);
 const BUILD_FILE_NAME = 'build.yml';
@@ -41,7 +41,6 @@ function checkNeedsRebuild() {
       needsRebuild = false;
     }
   }
-
   return needsRebuild;
 }
 
diff --git a/packages/opencascade/package.json b/packages/opencascade/package.json
index adfbd3fa..f022946f 100644
--- a/packages/opencascade/package.json
+++ b/packages/opencascade/package.json
@@ -28,12 +28,15 @@
     "url": "https://github.com/jupytercad/jupytercad.git"
   },
   "scripts": {
-    "build": "node build_opencascade_wasm.js && tsc && copyfiles --up 1 src/*.d.ts src/*.js src/*.wasm lib",
-    "build:prod": "node build_opencascade_wasm.js && tsc && copyfiles --up 1 src/*.d.ts src/*.js src/*.wasm lib"
+    "build": "tsc && node build_opencascade_wasm.js",
+    "build:prod": "tsc && node build_opencascade_wasm.js",
+    "clean": "rimraf tsconfig.tsbuildinfo lib"
   },
   "devDependencies": {
     "copyfiles": "^2.4.1",
-    "js-yaml": "^4.1.0"
+    "js-yaml": "^4.1.0",
+    "rimraf": "^3.0.2",
+    "typescript": "^5"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/opencascade/src/index.ts b/packages/opencascade/src/index.ts
index 32989ce8..51cef5fb 100644
--- a/packages/opencascade/src/index.ts
+++ b/packages/opencascade/src/index.ts
@@ -1,12 +1,9 @@
 import initOpenCascade from 'opencascade.js';
 
-import opencascade from './jupytercad.opencascade.js';
-// eslint-disable-next-line no-undef
-// eslint-disable-next-line @typescript-eslint/ban-ts-comment
-// @ts-ignore
+import opencascade from './jupytercad.opencascade';
 import opencascadeWasm from './jupytercad.opencascade.wasm';
 
-export * as OCC from './jupytercad.opencascade.js';
+export * as OCC from './jupytercad.opencascade';
 
 export async function initializeOpenCascade() {
   return initOpenCascade({
diff --git a/packages/opencascade/src/jupytercad.opencascade.d.ts b/packages/opencascade/src/jupytercad.opencascade.d.ts
new file mode 100644
index 00000000..e3dff3ef
--- /dev/null
+++ b/packages/opencascade/src/jupytercad.opencascade.d.ts
@@ -0,0 +1 @@
+export default null as any;
diff --git a/packages/opencascade/src/jupytercad.opencascade.wasm.d.ts b/packages/opencascade/src/jupytercad.opencascade.wasm.d.ts
new file mode 100644
index 00000000..e3dff3ef
--- /dev/null
+++ b/packages/opencascade/src/jupytercad.opencascade.wasm.d.ts
@@ -0,0 +1 @@
+export default null as any;
diff --git a/yarn.lock b/yarn.lock
index 21428cb4..3bcec052 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1101,6 +1101,8 @@ __metadata:
     copyfiles: ^2.4.1
     js-yaml: ^4.1.0
     opencascade.js: beta
+    rimraf: ^3.0.2
+    typescript: ^5
   languageName: unknown
   linkType: soft
 
@@ -12072,11 +12074,11 @@ __metadata:
 
 "typescript@patch:typescript@>=3 < 6#~builtin<compat/typescript>, typescript@patch:typescript@^5#~builtin<compat/typescript>":
   version: 5.2.2
-  resolution: "typescript@patch:typescript@npm%3A5.2.2#~builtin<compat/typescript>::version=5.2.2&hash=f3b441"
+  resolution: "typescript@patch:typescript@npm%3A5.2.2#~builtin<compat/typescript>::version=5.2.2&hash=85af82"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: 0f4da2f15e6f1245e49db15801dbee52f2bbfb267e1c39225afdab5afee1a72839cd86000e65ee9d7e4dfaff12239d28beaf5ee431357fcced15fb08583d72ca
+  checksum: 07106822b4305de3f22835cbba949a2b35451cad50888759b6818421290ff95d522b38ef7919e70fb381c5fe9c1c643d7dea22c8b31652a717ddbd57b7f4d554
   languageName: node
   linkType: hard