W: cgroups are not available on the host, not using them.
I: pbuilder: network access will be disabled during build
I: Current time: Sun Jan 14 11:31:11 +14 2024
I: pbuilder-time-stamp: 1705181471
I: Building the build Environment
I: extracting base tarball [/var/cache/pbuilder/bullseye-reproducible-base.tgz]
I: copying local configuration
W: --override-config is not set; not updating apt.conf Read the manpage for details.
I: mounting /proc filesystem
I: mounting /sys filesystem
I: creating /{dev,run}/shm
I: mounting /dev/pts filesystem
I: redirecting /dev/ptmx to /dev/pts/ptmx
I: policy-rc.d already exists
I: using eatmydata during job
I: Copying source file
I: copying [networkx_2.5+ds-2.dsc]
I: copying [./networkx_2.5+ds.orig.tar.xz]
I: copying [./networkx_2.5+ds-2.debian.tar.xz]
I: Extracting source
unshare: unshare failed: Cannot allocate memory
E: pbuilder: Failed extracting the source
I: unmounting dev/ptmx filesystem
I: unmounting dev/pts filesystem
I: unmounting dev/shm filesystem
I: unmounting proc filesystem
I: unmounting sys filesystem
I: cleaning the build env 
I: removing directory /srv/workspace/pbuilder/10598 and its subdirectories