How to change system-dependent path ?

[Migacz85]

After executing ./configure
I got that message, and I'm stuck here.
How i can set this in the easiest way ?

"Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables XORG_CFLAGS
and XORG_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details. "

[p2rkw]

Please try sudo apt build-dep xserver-xorg-input-mtrack beforehand.

[Migacz85]

sudo pacman -S build-dep xserver-xorg-input-mtrack
[sudo] password for migacz:
error: target not found: build-dep
error: target not found: xserver-xorg-input-mtrack

:-)
Probably i need to use AUR