$ vim src/pkgmk.conf
Add pkgmk-cross to the PATH environment variable:
-$ export PATH=/devel/crux-arm/pkgutils-cross:/devel/crux-arm/pkgutils-cross/src:$PATH
+$ export PATH=/devel/crux-arm/pkgutils-cross:$PATH
(note that append the old value for PATH at the end is important)
Now you're ready to crosscompile packages: