This error seems not to be related to Python 3.8 because the package fails to build from source in fedora rawhide with Python 3.7 and the same error message.

ENTER ['do_with_status'](['bash', '--login', '-c', '/usr/bin/rpmbuild -bb --target x86_64 --nodeps /builddir/build/SPECS/gpsd.spec'], chrootPath='/var/lib/mock/945533-fedora-rawhide-x86_64-1561603566.650318/root'env={'TERM': 'vt100', 'SHELL': '/bin/bash', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'PROMPT_COMMAND': 'printf "\\033]0;<mock-chroot>\\007"', 'PS1': '<mock-chroot> \\s-\\v\\$ ', 'LANG': 'en_US.UTF-8'}shell=Falselogger=<mockbuild.trace_decorator.getLog object at 0x7f37804966d8>timeout=0uid=1001gid=135user='mockbuild'nspawn_args=['--capability=cap_ipc_lock', '--bind=/tmp/mock-resolv.l35qi8jq:/etc/resolv.conf']unshare_net=TrueprintOutput=True)
Using nspawn with args ['--capability=cap_ipc_lock', '--bind=/tmp/mock-resolv.l35qi8jq:/etc/resolv.conf']
Executing command: ['/usr/bin/systemd-nspawn', '-q', '-M', 'f3c5e5512199492db8f0b2bdfef3b2bd', '-D', '/var/lib/mock/945533-fedora-rawhide-x86_64-1561603566.650318/root', '-a', '--capability=cap_ipc_lock', '--bind=/tmp/mock-resolv.l35qi8jq:/etc/resolv.conf', '--setenv=TERM=vt100', '--setenv=SHELL=/bin/bash', '--setenv=HOME=/builddir', '--setenv=HOSTNAME=mock', '--setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin', '--setenv=PROMPT_COMMAND=printf "\\033]0;<mock-chroot>\\007"', '--setenv=PS1=<mock-chroot> \\s-\\v\\$ ', '--setenv=LANG=en_US.UTF-8', '-u', 'mockbuild', 'bash', '--login', '-c', '/usr/bin/rpmbuild -bb --target x86_64 --nodeps /builddir/build/SPECS/gpsd.spec'] with env {'TERM': 'vt100', 'SHELL': '/bin/bash', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'PROMPT_COMMAND': 'printf "\\033]0;<mock-chroot>\\007"', 'PS1': '<mock-chroot> \\s-\\v\\$ ', 'LANG': 'en_US.UTF-8'} and shell False
BUILDSTDERR: error: This macro requires some arguments
Building target platforms: x86_64
Building for target x86_64
Child return code was: 1
EXCEPTION: [Error()]

Maybe some error in specfile?

The problem seems to with the python3-gobject package. It needs to be rebuilt before gpsd.

DEBUG util.py:585:  BUILDSTDERR:  Problem: package python3-gobject-3.32.2-1.fc31.x86_64 requires python(abi) = 3.7, but none of the providers can be installed
DEBUG util.py:585:  BUILDSTDERR:   - package python3-devel-3.8.0~b1-1.fc31.x86_64 conflicts with python3 < 3.8.0~b1-1.fc31 provided by python3-3.7.4~rc1-1.fc31.x86_64
DEBUG util.py:585:  BUILDSTDERR:   - package python3-devel-3.8.0~b1-1.fc31.x86_64 conflicts with python3 < 3.8.0~b1-1.fc31 provided by python3-3.7.4~rc1-1.fc31.i686
DEBUG util.py:585:  BUILDSTDERR:   - cannot install the best candidate for the job

That is indeed a temporary error, but it only covers the real problem.

I get this in local rawhide mock:

Finish: build setup for gpsd-3.18.1-2.fc31.src.rpm
Start: rpmbuild gpsd-3.18.1-2.fc31.src.rpm
Start: Outputting list of installed packages
Finish: Outputting list of installed packages
error: This macro requires some arguments
Building target platforms: x86_64
Building for target x86_64
ERROR: Exception(/home/churchyard/rpmbuild/fedora-scm/gpsd/gpsd-3.18.1-2.fc31.src.rpm) Config(fedora-rawhide-x86_64) 0 minutes 44 seconds
INFO: Results and/or logs in: /home/churchyard/rpmbuild/fedora-scm/gpsd/results_gpsd/3.18.1/2.fc31
ERROR: Command failed: 
 # /usr/bin/systemd-nspawn -q -M b322116ce34345e9a918528a2db50b9e -D /var/lib/mock/fedora-rawhide-x86_64/root -a --capability=cap_ipc_lock --bind=/tmp/mock-resolv.t4i0p7tc:/etc/resolv.conf --setenv=TERM=vt100 --setenv=SHELL=/bin/bash --setenv=HOME=/builddir --setenv=HOSTNAME=mock --setenv=PATH=/usr/bin:/bin:/usr/sbin:/sbin --setenv=PROMPT_COMMAND=printf "\033]0;<mock-chroot>\007" --setenv=PS1=<mock-chroot> \s-\v\$  --setenv=LANG=cs_CZ.utf8 -u mockbuild bash --login -c /usr/bin/rpmbuild -bb --target x86_64 --nodeps /builddir/build/SPECS/gpsd.spec

Could not execute mockbuild: Failed to execute command.


I believe the macro in question is %systemd_postun - it starts the build fine if I remove it.

It should be now fixed in git. Thanks.

I'll build the package in couple days. There is a rebase breaking the API.