Relax the immutable option to yarnpkg install

debian/gitlab.install

@@ -68,7 +68,7 @@ security.txt usr/share/gitlab
 sidekiq_cluster usr/share/gitlab
 storybook usr/share/gitlab
 tests.yml usr/share/gitlab
-yarn.lock usr/share/gitlab
+yarn.lock var/lib/gitlab
 tooling usr/share/gitlab
 vendor usr/share/gitlab
 VERSION usr/share/gitlab

debian/gitlab.links

@@ -4,7 +4,7 @@ var/lib/gitlab/db usr/share/gitlab/db
 var/lib/gitlab/node_modules usr/share/gitlab/node_modules
 usr/share/gitlab/package.json var/lib/gitlab/package.json
 var/lib/gitlab/yarn-error.log usr/share/gitlab/yarn-error.log
-usr/share/gitlab/yarn.lock var/lib/gitlab/yarn.lock
+var/lib/gitlab/yarn.lock usr/share/gitlab/yarn.lock
 var/lib/gitlab/.yarn usr/share/gitlab/.yarn
 var/lib/gitlab/.yarnrc.yml usr/share/gitlab/.yarnrc.yml
 var/lib/gitlab/.ssh usr/share/gitlab/.ssh

debian/gitlab.postinst

@@ -170,6 +170,7 @@ case "$1" in
 
     # Make package.json writable for yarn 2
     chown ${gitlab_user}: /var/lib/gitlab/package.json
+    chown ${gitlab_user}: /var/lib/gitlab/yarn.lock
 
     runuser -u ${gitlab_user} -- sh -c "chmod 700 ${gitlab_uploads_path}"
     runuser -u ${gitlab_user} -- sh -c 'git config --global core.autocrlf "input"'

debian/rake-tasks.sh

@@ -43,7 +43,7 @@ cd /var/lib/gitlab
 runuser -u ${gitlab_user} -- sh -c 'install -d /var/lib/gitlab/.cache'
 runuser -u ${gitlab_user} -- sh -c 'yarnpkg set version berry'
 runuser -u ${gitlab_user} -- sh -c 'if ! grep nodeLinker .yarnrc.yml >/dev/null; then echo "nodeLinker: \"node-modules\"" >>.yarnrc.yml; fi'
-runuser -u ${gitlab_user} -- sh -c 'NODE_ENV=production yarnpkg install --immutable'
+runuser -u ${gitlab_user} -- sh -c 'NODE_ENV=production yarnpkg install'
 # Remove write permissions of .yarn-metadata.json files
 runuser -u ${gitlab_user} -- sh -c 'test -d "/var/lib/gitlab/.cache/yarn/v6" && find /var/lib/gitlab/.cache/yarn/v6/ -name .yarn-metadata.json -perm -a=w -exec chmod 644 {} \;'