[DRE-maint] Bug#744809: FTBFS: writes to file outside package build dir

[Christian Hofstaedtler]

Source: ruby-gnome2
Version: 2.1.0-1
Severity: serious
Justification: fails to build from source (but built successfully in the past)

Dear Maintainer,

your package "ruby-gnome2" failed to build from source during a test
rebuild of all ruby related packages, with this output:

  + make install DESTDIR=/«PKGBUILDDIR»/debian/tmp sitelibdir=/usr/lib/ruby/vendor_ruby sitearchdir=/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.1.0
  make[2]: Leaving directory `/«PKGBUILDDIR»'
  make[2]: Entering directory `/«PKGBUILDDIR»'
  (cd 'glib2' && make install)
  make[3]: Entering directory `/«PKGBUILDDIR»/glib2'
  (cd ext/glib2 && make install)
  make[4]: Entering directory `/«PKGBUILDDIR»/glib2/ext/glib2'
  /usr/bin/install -c -m 644 /«PKGBUILDDIR»/glib2/ext/glib2/rbglib.h /usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.1.0
  /usr/bin/install: cannot create regular file '/usr/lib/x86_64-linux-gnu/ruby/vendor_ruby/2.1.0/rbglib.h': Permission denied
  make[4]: *** [install-headers] Error 1


The full build log can be found at:
http://aws-logs.debian.net/ftbfs-logs/ruby-14-4-14/logs/ruby-gnome2_2.1.0-1_unstable.log

  -ch