I get it after:
make clean configure make-yarn-cache clean build deinstall install
Before it (first time, during update from vscode-1.63.2_4), I get:
[4/4] Building fresh packages...
$ node build/npm/postinstall.js
Installing dependencies in build...
$ yarn --frozen-lockfile --offline
===> Installing for vscode-1.64.0
===> Checking if vscode is already installed
===> Registering installation for vscode-1.64.0
pkg-static: Unable to access file
/usr/ports/editors/vscode/work/stage/usr/local/share/code-oss/resources/app/node_modules.asar.unpacked/@parcel/watcher/build/Release