chore(ci): fix nvm error on configuring functional tests npm production environment

Author: rpl

.circleci/config.yml

@@ -120,7 +120,11 @@ commands:
       - run:
           ## (See #1082 for rationale).
           name: run functional tests in npm production environment
-          command: npm run test-functional
+          command: |
+            nvm --help && nvm run npm run test-functional
+            nvm --help || (
+              NPM_CONFIG_PREFIX=~/.npm-global npm run test-functional
+            )
           environment:
             TEST_PRODUCTION_MODE: 1
             CI_RETRY_ONCE: << parameters.retry_once >>
@@ -131,7 +135,11 @@ commands:
             - run:
                 ## (See #1639 for rationale).
                 name: run functional tests in npm legacy bundling mode
-                command: npm run test-functional
+                command: |
+                  nvm --help && nvm run npm run test-functional
+                  nvm --help || (
+                    NPM_CONFIG_PREFIX=~/.npm-global npm run test-functional
+                  )
                 environment:
                   TEST_PRODUCTION_MODE: 1
                   TEST_LEGACY_BUNDLING: 1
@@ -156,7 +164,6 @@ commands:
     steps:
       # NOTE: keep the following steps compatible with both bash and cmd.exe
       - run: cd .. && mkdir .npm-global
-      - run: npm config set prefix '../.npm-global'
 
 jobs:
   build: