Use yarnpkg/berry#2161

.github/workflows/ci.yml

@@ -63,9 +63,8 @@ jobs:
     name: Build Babel Artifacts
     needs: prepare-yarn-cache
     runs-on: ubuntu-latest
-    # Yarn PnP does not support native ESM yet (https://github.com/yarnpkg/berry/issues/638)
-    # env:
-    #    YARN_NODE_LINKER: pnp # use pnp linker for better linking performance and stricter checks
+    env:
+      YARN_NODE_LINKER: pnp # use pnp linker for better linking performance and stricter checks
     steps:
       - name: Checkout code
         uses: actions/checkout@v2

.gitignore

@@ -5,6 +5,8 @@
 .yarn/build-state.yml
 .yarn/install-state.gz
 .pnp.js
+.pnp.cjs
+.pnp-loader.mjs
 
 .DS_Store
 **/node_modules

.yarnrc

@@ -1,3 +1,3 @@
 # Use Yarn 3
 # This path should always match the one in .yarnrc.yml
-yarn-path ".yarn/releases/yarn-3.0.0-rc.1.cjs"
+yarn-path ".yarn/releases/yarn-sources.cjs"

.yarnrc.yml

@@ -6,6 +6,8 @@ enableGlobalCache: true
 
 enableTransparentWorkspaces: false
 
+enableExperimentalEsmLoader: true
+
 nodeLinker: node-modules
 
 plugins:
@@ -33,4 +35,4 @@ releaseTool:
 unsafeHttpWhitelist:
   - localhost
 
-yarnPath: .yarn/releases/yarn-3.0.0-rc.1.cjs
+yarnPath: .yarn/releases/yarn-sources.cjs

yarn.lock

@@ -14651,11 +14651,11 @@ fsevents@^1.2.7:
 
 "typescript@patch:typescript@~4.2.3#~builtin<compat/typescript>":
   version: 4.2.3
-  resolution: "typescript@patch:typescript@npm%3A4.2.3#~builtin<compat/typescript>::version=4.2.3&hash=34ad7d"
+  resolution: "typescript@patch:typescript@npm%3A4.2.3#~builtin<compat/typescript>::version=4.2.3&hash=ea7f47"
   bin:
     tsc: bin/tsc
     tsserver: bin/tsserver
-  checksum: c1dd9e722d11f93a66aa365459bc155aa48ee366f4194b743f9de0b62c1c5242e82a482c49fa8d2bcb3a90ecf4c1a35e1ac534df7408d17d17eb15718a6ad0fc
+  checksum: f24cd922182bb29e1849fa72dffc25ff37f2177646b5526100e8638baf69e5498969e2364ae1a1deba8e74d0d101c1a91b73e6b5d3d9a3c8674c7ac95b3f67cd
   languageName: node
   linkType: hard