On Sun, 22 Jul 2018 16:03:20 +0200, Peter Nabbefeld wrote: >pacman -U > >The curious issue here is, linux-headers is installed, but the package >hasn't been put into the cache If you use 'pacman -U' to install from an Arch repository by using the URL, the package as well as the signature are stored in cache. Note, 'pacman -Sc' would remove the package, but not the signature. If you use 'pacman -U' to install from a directory on your machine, no copy will be stored in cache. This makes sense, since you might install from a cache for local build packages and you unlikely want to cache the same package two times.