jmtd commented on pull request #556:
URL: https://github.com/apache/maven/pull/556#issuecomment-931290865


   I'm not sure whether this level of complication is warranted in the patch 
itself (and I'd love your input on that), but, via 
[1](https://unix.stackexchange.com/a/188365), the following resolves the 
"someone has redefined unset" problem in non-POSIX bash (but not zsh):
   
       echo "`POSIXLY_CORRECT=1 \\unset -f command; \\command -v java`"


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