Running "make install" from an arbitrary source directory currently by default either installs to a user-accessible ENV_PREFIX, or, if DEVELOPMENT is set to false, tries to install into the system's root filesystem, but fails over permission errors. This was by design: To now, I considered trying the latter ill-conceived, because installing without package manager control bears the risk of leaving unversioned files in the system.
Actually, thinking again, during development this looks like a valid use case: Having run pkg-rebuild-reinstall before, installing from a source directory will leave a trace in the package manager's hash check output, will be handled during the next clean install, and might be a useful shortcut for trying things in the root file system.
So make this possible by:
$ DEVELOPMENT=false make install
Signed-off-by: Jan Lindemann <jan@janware.com>