Partially revert 16f148d9894ce5a64e228da787df1a21b350b3ac
Partially revert 16f148d9894ce5a64e228da787df1a21b350b3ac

Looks like an unwanted system call slipped into which is
affecting generation of RubyGems packages under Windows.

(there is no 'env' under Windows).

envato/rake,ipmobiletech/rake,pjump/rake,codedogfish/rake,88rabbit/rake,mat/rake,bentley/rake,pivotalforks/rake,Vanzct/rake,taiganakagawa/rake,tmornini/rake,ruby/rake,envato/rake,ruby/rake,pivotalforks/rake,mat/rake,hsbt/rake,jaustinhughey/rake,hsbt/rake,utilum/rake,esasse/rake,askl56/rake,zzak/rake