ci: export GOPATH

.github/workflows/ci.yml

@@ -123,6 +123,8 @@ jobs:
         sudo apt-get install -y --no-install-recommends libssh2-1-dev
         go install golang.org/x/tools/cmd/stringer@latest
     - name: Generate files
-      run: make generate
+      run: |
+        export PATH=$(go env GOPATH)/bin:$PATH
+        make generate
     - name: Check nothing changed
       run: git diff --quiet --exit-code || (echo "detected changes after generate" ; git status ; exit 1)