guix package: error: build failed: derivation has incorrect output

["Bruno Félix Rezende Ribeiro" <oitofelix@gnu.org>]

Running

  guix package -i windowmaker

gives me

  guix package: error: build failed: derivation
  `/gnu/store/pxyjsl5xv387kbx55lw97pjrlfzfxpcp-guile-bootstrap-2.0.drv'
  has incorrect output
  `/home/felix/gnu/store/ka1kwmxk2ffkjhfp84y4s192kximrxfz-guile-bootstrap-2.0',
  should be
  `/gnu/store/3pxvfkc3fca9cdpp5fqci8dy6r4s5cph-guile-bootstrap-2.0'

Any Idea why?


Context info:

I've configured Guix with the option
'--prefix=/home/felix/opt/guix.git' and installed it just to discover I
would like to have added '--with-store-dir=/home/felix/gnu/store'; then
I reinvoked configure from the previous VPATH build and then 'make'
only rebuilt 'guix/config.go' from 'guix/config.scm'.  After that I
installed Guix again.  I didn't run 'make clean' because this is an
Yeeloong and as such I'm trying to avoid the fatigue.

I've chowned 'guix-daemon' to 'root:root' and chomoded it to 'ug+s'.
Then, running 'guix package -i windowmaker' for the first time resulted
in

  guix package: error: build failed: Nix database directory
  `/home/felix/opt/guix.git/var/guix/db' is not writable: Permission
  denied

Facing that I chmoded '~felix/opt/guix.git/var/guix/db/' to 'o+w', and
all went fine to the error described on this mail's top.


-- 
 ,= ,-_-. =.  Bruno Félix Rezende Ribeiro (oitofelix) [0x28D618AF]
((_/)o o(\_)) There is no system but GNU;
 `-'(. .)`-'  GNU Linux-Libre is one of its official kernels;
     \_/      All software must be free as in freedom;