more appveyor debugging

Author: isaacs

appveyor.yml

@@ -21,7 +21,6 @@ install:
   - npm config set -g strict-ssl=false
   # upgrade node-gyp to dodge 2013 compile issue present in the node gyp bundled with node v0.10
   # https://github.com/nodejs/node-gyp/issues/972#issuecomment-231055109
-  - npm install --production node-gyp
   - node --version
   - npm --version
   #- SET PATH=%APPDATA%\npm;%PATH%
@@ -34,6 +33,7 @@ install:
   - IF /I "%PLATFORM%" == "x86" CALL "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86
   - npm install
   - npm ls
+  - npm install node-gyp
   - npm test
 
 build: off