D: [iurt_root_command] chroot
Building target platforms: x86_64
Building for target x86_64
error: /home/pterjan/rpmbuild/SPECS/python-jupyter-packaging.spec: line 56: Failed to open shell expansion pipe for command: [ -z "$RPM_BUILD_NCPUS" ] \
	&& RPM_BUILD_NCPUS="48"; \
        ncpus_max=-j8; \
        if [ -n "$ncpus_max" ] && [ "$ncpus_max" -gt 0 ] && [ "$RPM_BUILD_NCPUS" -gt "$ncpus_max" ]; then RPM_BUILD_NCPUS="$ncpus_max"; fi; \
        echo "$RPM_BUILD_NCPUS";: Resource temporarily unavailable 
  5<            (%)
  4<          (%__smp_use_ncpus)
  3<        (%_smp_build_ncpus)
  3<        (%)
  2<      (%expand)
  1<    (%py3_test_envvars)
  0<  (%pytest)
I: [iurt_root_command] ERROR: chroot