Why do I suddenly keep having gulp version mismatch global<>local when installing Gulp?

After installing gulp ("npm install gulp --save-dev"), upon launching "gulp watch" I now systematically get:[16:49:48] Warning: gulp version mismatch: [16:49:48] Global gulp is 3.9.1 [16:49:48] Local gulp is 1.0.0 Which forces me to do "npm install gulp@3.9.1 --save-dev". But why does NPN install gulp version 1.0.0? And why it never used to do that on my machine up to a week ago?

Submitted May 18, 2017 at 04:52PM by draikin3