[Msys2-users] How to re-connect with pacman

[Greg J. <gv...@gm...>]

I've moved my msys2 tree a few times from its original location;  when
installed,
it was in a subdirectory C:\programs\msys64. now its in c:\msys64 as that
was needed to get
maintenancetool to read the components.xml.
  I have a a relatively smooth ride with pacman, but I've never been able
to get a list
of available packages.  From other notes on the web I found Pacman -S
base-devel brought
in a lot of what I missed, etc.  Then I brought in CMAKE but didn't want it
because it was
going to be QT-needy and not be more functional than 5 other cmake
installations I already have.
so I say,

"$ pacman -R cmake-git
warning: database file for 'mingw-w64' does not exist
error: target not found: cmake-git

Pacman -Q lists the names I have in var/ .. /pcaman/pkg alright,  and I
have a directory full of empty directories named
this way, so pacman will know what I have.  I have a recent mingw-w64.db I
simply downloaded, can I place this somewhere
that pacman will read it; Is there windows registry values, from the
original installation location, tripping up the operation?