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From: Angelo Graziosi <angelo.graziosi@alice.it>
Newsgroups: gmane.emacs.devel
Subject: Wrong PATH in MSYS2/MINGW64 builds?
Date: Thu, 28 May 2015 15:56:07 +0200
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Trying to visit a bzip2 file (foo.txt.bz2) with 
mingw-w64-emacs-git-r121447.8a9ba4d-1 installed package, I got

  Uncompression program `bzip2' not found

So, trying

   (getenv "PATH")

from scratch buffer, prints:

"C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\"


I wonder if this is Windows-builds related of we can do a better build. 
BTW I HAVE bzip2 installed (both in MINGW64 and MSYS2 shells):

MINGW64 ~
$ type bzip2
bzip2 is /mingw64/bin/bzip2

MSYS ~
$ type bzip2
bzip2 is /usr/bin/bzip2


Ciao,
  Angelo.