$ cower -d packer
:: packer downloaded to /tmp
$ cd packer
$ makepkg -si
==> Determining latest git revision...
-> Version found: 20120307
==> Making package: packer 20120307-1 (Wed Mar 7 17:39:09 CET 2012)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
==> Extracting Sources...
==> Removing existing pkg/ directory...
==> Entering fakeroot environment...
==> Starting build()...
==> Connecting to github GIT server....
Cloning into packer...
fatal: Unable to find remote helper for 'https'
==> ERROR: A failure occurred in build().
Aborting...