Suggested by Pjotr Prins <pjotr.public12@thebird.nl> at <http://lists.gnu.org/archive/html/guix-devel/2015-04/msg00229.html>. * gnu/build/install.scm (populate-single-profile-directory): New procedure. * gnu/system/install.scm (self-contained-tarball): New procedure. * Makefile.am (guix-binary.%.tar.xz): New target.