Sourcing envkernel.sh has an exit code of 1

When sourcing envkernel.sh, it has an exit code of 1, making it impossible to use sanely within other Bash/Python scripts

~/code/mainline$ source ~/code/pmbootstrap/helpers/envkernel.sh
pmbootstrap envkernel.sh activated successfully.
* kernel source:  ~/code/mainline
* output folder:  ~/code/mainline/.output
* architecture:   arm (samsung-expressatt is armv7)
* cross compile:  armv7-alpine-linux-musleabihf-gcc (Alpine 11.2.1_git20220219)
* aliases: make, kernelroot, pmbootstrap, pmbroot, run-script (see 'type make' etc.)
* run 'deactivate' to revert all env changes
[envkernel] ~/code/mainline$ echo $?
1