After upgrading to Ubuntu 21.10, mmdebstrap fails to build for foreign architectures:
```
$ mmdebstrap -v --variant=minbase --mode=unshare --architectures=armel bullseye example.tar
I: armel cannot be executed, falling back to qemu-user
I: automatically chosen format: tar
I: using /tmp/mmdebstrap.VJaycRaHdt as tempdir
I: running apt-get update...
Get:1 http://deb.debian.org/debian bullseye InRelease [116 kB]
Get:2 http://security.debian.org/debian-security bullseye-security InRelease [44.1 kB]
Get:3 http://security.debian.org/debian-security bullseye-security/main armel Packages [84.3 kB]
Get:4 http://deb.debian.org/debian bullseye-updates InRelease [39.4 kB]
Get:5 http://deb.debian.org/debian bullseye/main armel Packages [7863 kB]
Get:6 http://deb.debian.org/debian bullseye-updates/main armel Packages [2604 B]
Fetched 8150 kB in 3s (2917 kB/s)
Reading package lists...
I: downloading packages with apt...
Reading package lists...
Building dependency tree...
The following additional packages will be installed:
debconf gcc-10-base libacl1 libattr1 libaudit-common libaudit1 libblkid1
libbz2-1.0 libc6 libcap-ng0 libcom-err2 libcrypt1 libdb5.3 libdebconfclient0
libgcc-s1 libgcrypt20 libgmp10 libgpg-error0 libgssapi-krb5-2 libk5crypto3
libkeyutils1 libkrb5-3 libkrb5support0 liblz4-1 liblzma5 libmount1 libnsl2
libpam-modules libpam-modules-bin libpam-runtime libpam0g libpcre2-8-0
libpcre3 libselinux1 libsmartcols1 libssl1.1 libsystemd0 libtinfo6
libtirpc-common libtirpc3 libudev1 libuuid1 libzstd1 lsb-base mawk zlib1g
Suggested packages:
bash-doc debconf-doc debconf-utils whiptail | dialog
libterm-readline-gnu-perl libgtk3-perl libnet-ldap-perl perl
debconf-kde-helper diffutils-doc wdiff apt debsig-verify mlocate | locate
less glibc-doc libc-l10n locales rng-tools krb5-doc krb5-user libpam-doc
sensible-utils bzip2 ncompress xz-utils tar-scripts tar-doc dosfstools kbd
util-linux-locales
Recommended packages:
bash-completion bsdextrautils apt-utils debconf-i18n manpages libidn2-0
libnss-nis libnss-nisplus libgpg-error-l10n krb5-locales uuid-runtime
The following NEW packages will be installed:
base-files base-passwd bash bsdutils coreutils dash debconf debianutils
diffutils dpkg findutils gcc-10-base grep gzip hostname init-system-helpers
libacl1 libattr1 libaudit-common libaudit1 libblkid1 libbz2-1.0 libc-bin
libc6 libcap-ng0 libcom-err2 libcrypt1 libdb5.3 libdebconfclient0 libgcc-s1
libgcrypt20 libgmp10 libgpg-error0 libgssapi-krb5-2 libk5crypto3
libkeyutils1 libkrb5-3 libkrb5support0 liblz4-1 liblzma5 libmount1 libnsl2
libpam-modules libpam-modules-bin libpam-runtime libpam0g libpcre2-8-0
libpcre3 libselinux1 libsmartcols1 libssl1.1 libsystemd0 libtinfo6
libtirpc-common libtirpc3 libudev1 libuuid1 libzstd1 login lsb-base mawk
ncurses-base ncurses-bin perl-base sed sysvinit-utils tar util-linux zlib1g
0 upgraded, 69 newly installed, 0 to remove and 0 not upgraded.
Need to get 24.5 MB of archives.
After this operation, 87.0 MB of additional disk space will be used.
Get:1 http://deb.debian.org/debian bullseye/main armel gcc-10-base armel 10.2.1-6 [201 kB]
Get:2 http://deb.debian.org/debian bullseye/main armel libcrypt1 armel 1:4.4.18-4 [97.0 kB]
Get:3 http://deb.debian.org/debian bullseye/main armel libc6 armel 2.31-13+deb11u2 [2338 kB]
Get:4 http://deb.debian.org/debian bullseye/main armel libgcc-s1 armel 10.2.1-6 [38.4 kB]
Get:5 http://deb.debian.org/debian bullseye/main armel mawk armel 1.3.4.20200120-2 [103 kB]
Get:6 http://deb.debian.org/debian bullseye/main armel base-files armel 11.1+deb11u1 [70.0 kB]
Get:7 http://deb.debian.org/debian bullseye/main armel libtinfo6 armel 6.2+20201114-2 [327 kB]
Get:8 http://deb.debian.org/debian bullseye/main armel debianutils armel 4.11.2 [100 kB]
Get:9 http://deb.debian.org/debian bullseye/main armel bash armel 5.1-2+b3 [1340 kB]
Get:10 http://deb.debian.org/debian bullseye/main armel libgpg-error0 armel 1.38-2 [67.6 kB]
Get:11 http://deb.debian.org/debian bullseye/main armel libgcrypt20 armel 1.8.7-6 [482 kB]
Get:12 http://deb.debian.org/debian bullseye/main armel liblz4-1 armel 1.9.3-2 [53.3 kB]
Get:13 http://deb.debian.org/debian bullseye/main armel liblzma5 armel 5.2.5-2 [159 kB]
Get:14 http://deb.debian.org/debian bullseye/main armel libzstd1 armel 1.4.8+dfsg-2.1 [272 kB]
Get:15 http://deb.debian.org/debian bullseye/main armel libsystemd0 armel 247.3-6 [347 kB]
Get:16 http://deb.debian.org/debian bullseye/main armel bsdutils armel 1:2.36.1-8 [141 kB]
Get:17 http://deb.debian.org/debian bullseye/main armel libacl1 armel 2.2.53-10 [28.4 kB]
Get:18 http://deb.debian.org/debian bullseye/main armel libattr1 armel 1:2.4.48-6 [20.4 kB]
Get:19 http://deb.debian.org/debian bullseye/main armel libgmp10 armel 2:6.2.1+dfsg-1 [509 kB]
Get:20 http://deb.debian.org/debian bullseye/main armel libpcre2-8-0 armel 10.36-2 [211 kB]
Get:21 http://deb.debian.org/debian bullseye/main armel libselinux1 armel 3.1-3 [80.9 kB]
Get:22 http://deb.debian.org/debian bullseye/main armel coreutils armel 8.32-4 [2704 kB]
Get:23 http://deb.debian.org/debian bullseye/main armel libbz2-1.0 armel 1.0.8-4 [45.5 kB]
Get:24 http://deb.debian.org/debian bullseye/main armel zlib1g armel 1:1.2.11.dfsg-2 [84.7 kB]
Get:25 http://deb.debian.org/debian bullseye/main armel tar armel 1.34+dfsg-1 [816 kB]
Get:26 http://deb.debian.org/debian bullseye/main armel dpkg armel 1.20.9 [2420 kB]
Get:27 http://deb.debian.org/debian bullseye/main armel perl-base armel 5.32.1-4+deb11u2 [1464 kB]
Get:28 http://deb.debian.org/debian bullseye/main armel debconf all 1.5.77 [144 kB]
Get:29 http://deb.debian.org/debian bullseye/main armel dash armel 0.5.11+git20200708+dd9ef66-5 [109 kB]
Get:30 http://deb.debian.org/debian bullseye/main armel diffutils armel 1:3.7-5 [355 kB]
Get:31 http://deb.debian.org/debian bullseye/main armel findutils armel 4.8.0-1 [677 kB]
Get:32 http://deb.debian.org/debian bullseye/main armel libpcre3 armel 2:8.39-13 [317 kB]
Get:33 http://deb.debian.org/debian bullseye/main armel grep armel 3.6-1 [388 kB]
Get:34 http://deb.debian.org/debian bullseye/main armel gzip armel 1.10-4 [129 kB]
Get:35 http://deb.debian.org/debian bullseye/main armel hostname armel 3.23 [14.2 kB]
Get:36 http://deb.debian.org/debian bullseye/main armel libaudit-common all 1:3.0-2 [14.8 kB]
Get:37 http://deb.debian.org/debian bullseye/main armel libcap-ng0 armel 0.7.9-2.2+b1 [13.5 kB]
Get:38 http://deb.debian.org/debian bullseye/main armel libaudit1 armel 1:3.0-2 [47.2 kB]
Get:39 http://deb.debian.org/debian bullseye/main armel libpam0g armel 1.4.0-9+deb11u1 [125 kB]
Get:40 http://deb.debian.org/debian bullseye/main armel libdb5.3 armel 5.3.28+dfsg1-0.8 [572 kB]
Get:41 http://deb.debian.org/debian bullseye/main armel libcom-err2 armel 1.46.2-2 [73.5 kB]
Get:42 http://deb.debian.org/debian bullseye/main armel libkrb5support0 armel 1.18.3-6+deb11u1 [62.3 kB]
Get:43 http://deb.debian.org/debian bullseye/main armel libk5crypto3 armel 1.18.3-6+deb11u1 [108 kB]
Get:44 http://deb.debian.org/debian bullseye/main armel libkeyutils1 armel 1.6.1-2 [14.5 kB]
Get:45 http://deb.debian.org/debian bullseye/main armel libssl1.1 armel 1.1.1k-1+deb11u1 [1277 kB]
Get:46 http://deb.debian.org/debian bullseye/main armel libkrb5-3 armel 1.18.3-6+deb11u1 [315 kB]
Get:47 http://deb.debian.org/debian bullseye/main armel libgssapi-krb5-2 armel 1.18.3-6+deb11u1 [142 kB]
Get:48 http://deb.debian.org/debian bullseye/main armel libtirpc-common all 1.3.1-1 [13.4 kB]
Get:49 http://deb.debian.org/debian bullseye/main armel libtirpc3 armel 1.3.1-1 [70.8 kB]
Get:50 http://deb.debian.org/debian bullseye/main armel libnsl2 armel 1.3.0-2 [33.0 kB]
Get:51 http://deb.debian.org/debian bullseye/main armel libpam-modules-bin armel 1.4.0-9+deb11u1 [104 kB]
Get:52 http://deb.debian.org/debian bullseye/main armel libpam-modules armel 1.4.0-9+deb11u1 [306 kB]
Get:53 http://deb.debian.org/debian bullseye/main armel libpam-runtime all 1.4.0-9+deb11u1 [207 kB]
Get:54 http://deb.debian.org/debian bullseye/main armel login armel 1:4.8.1-1 [651 kB]
Get:55 http://deb.debian.org/debian bullseye/main armel ncurses-bin armel 6.2+20201114-2 [420 kB]
Get:56 http://deb.debian.org/debian bullseye/main armel sed armel 4.7-1 [301 kB]
Get:57 http://deb.debian.org/debian bullseye/main armel libblkid1 armel 2.36.1-8 [183 kB]
Get:58 http://deb.debian.org/debian bullseye/main armel libmount1 armel 2.36.1-8 [193 kB]
Get:59 http://deb.debian.org/debian bullseye/main armel libsmartcols1 armel 2.36.1-8 [144 kB]
Get:60 http://deb.debian.org/debian bullseye/main armel libudev1 armel 247.3-6 [161 kB]
Get:61 http://deb.debian.org/debian bullseye/main armel libuuid1 armel 2.36.1-8 [82.6 kB]
Get:62 http://deb.debian.org/debian bullseye/main armel util-linux armel 2.36.1-8 [1052 kB]
Get:63 http://deb.debian.org/debian bullseye/main armel libdebconfclient0 armel 0.260 [50.2 kB]
Get:64 http://deb.debian.org/debian bullseye/main armel base-passwd armel 3.5.51 [56.7 kB]
Get:65 http://deb.debian.org/debian bullseye/main armel init-system-helpers all 1.60 [47.1 kB]
Get:66 http://deb.debian.org/debian bullseye/main armel libc-bin armel 2.31-13+deb11u2 [708 kB]
Get:67 http://deb.debian.org/debian bullseye/main armel ncurses-base all 6.2+20201114-2 [271 kB]
Get:68 http://deb.debian.org/debian bullseye/main armel lsb-base all 11.1.0 [28.7 kB]
Get:69 http://deb.debian.org/debian bullseye/main armel sysvinit-utils armel 2.96-7 [24.0 kB]
Fetched 24.5 MB in 3s (7817 kB/s)
Download complete and in download only mode
I: extracting archives...
I: installing essential packages...
ERROR: ld.so: object 'libgtk3-nocsd.so.0' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.
dpkg: error: need an action option
Type dpkg --help for help about installing and deinstalling packages [*];
Use 'apt' or 'aptitude' for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Options marked [*] produce a lot of output - pipe it through 'less' or 'more' !
E: run_chroot failed: E: env --unset=APT_CONFIG --unset=TMPDIR /usr/sbin/chroot /tmp/mmdebstrap.VJaycRaHdt dpkg --install --force-depends --status-fd=<$fd> /var/cache/apt/archives//base-files_11.1+deb11u1_armel.deb /var/cache/apt/archives//base-passwd_3.5.51_armel.deb /var/cache/apt/archives//bash_5.1-2+b3_armel.deb /var/cache/apt/archives//bsdutils_1%3a2.36.1-8_armel.deb /var/cache/apt/archives//coreutils_8.32-4_armel.deb /var/cache/apt/archives//dash_0.5.11+git20200708+dd9ef66-5_armel.deb /var/cache/apt/archives//debconf_1.5.77_all.deb /var/cache/apt/archives//debianutils_4.11.2_armel.deb /var/cache/apt/archives//diffutils_1%3a3.7-5_armel.deb /var/cache/apt/archives//dpkg_1.20.9_armel.deb /var/cache/apt/archives//findutils_4.8.0-1_armel.deb /var/cache/apt/archives//gcc-10-base_10.2.1-6_armel.deb /var/cache/apt/archives//grep_3.6-1_armel.deb /var/cache/apt/archives//gzip_1.10-4_armel.deb /var/cache/apt/archives//hostname_3.23_armel.deb /var/cache/apt/archives//init-system-helpers_1.60_all.deb /var/cache/apt/archives//libacl1_2.2.53-10_armel.deb /var/cache/apt/archives//libattr1_1%3a2.4.48-6_armel.deb /var/cache/apt/archives//libaudit-common_1%3a3.0-2_all.deb /var/cache/apt/archives//libaudit1_1%3a3.0-2_armel.deb /var/cache/apt/archives//libblkid1_2.36.1-8_armel.deb /var/cache/apt/archives//libbz2-1.0_1.0.8-4_armel.deb /var/cache/apt/archives//libc-bin_2.31-13+deb11u2_armel.deb /var/cache/apt/archives//libc6_2.31-13+deb11u2_armel.deb /var/cache/apt/archives//libcap-ng0_0.7.9-2.2+b1_armel.deb /var/cache/apt/archives//libcom-err2_1.46.2-2_armel.deb /var/cache/apt/archives//libcrypt1_1%3a4.4.18-4_armel.deb /var/cache/apt/archives//libdb5.3_5.3.28+dfsg1-0.8_armel.deb /var/cache/apt/archives//libdebconfclient0_0.260_armel.deb /var/cache/apt/archives//libgcc-s1_10.2.1-6_armel.deb /var/cache/apt/archives//libgcrypt20_1.8.7-6_armel.deb /var/cache/apt/archives//libgmp10_2%3a6.2.1+dfsg-1_armel.deb /var/cache/apt/archives//libgpg-error0_1.38-2_armel.deb /var/cache/apt/archives//libgssapi-krb5-2_1.18.3-6+deb11u1_armel.deb /var/cache/apt/archives//libk5crypto3_1.18.3-6+deb11u1_armel.deb /var/cache/apt/archives//libkeyutils1_1.6.1-2_armel.deb /var/cache/apt/archives//libkrb5-3_1.18.3-6+deb11u1_armel.deb /var/cache/apt/archives//libkrb5support0_1.18.3-6+deb11u1_armel.deb /var/cache/apt/archives//liblz4-1_1.9.3-2_armel.deb /var/cache/apt/archives//liblzma5_5.2.5-2_armel.deb /var/cache/apt/archives//libmount1_2.36.1-8_armel.deb /var/cache/apt/archives//libnsl2_1.3.0-2_armel.deb /var/cache/apt/archives//libpam-modules-bin_1.4.0-9+deb11u1_armel.deb /var/cache/apt/archives//libpam-modules_1.4.0-9+deb11u1_armel.deb /var/cache/apt/archives//libpam-runtime_1.4.0-9+deb11u1_all.deb /var/cache/apt/archives//libpam0g_1.4.0-9+deb11u1_armel.deb /var/cache/apt/archives//libpcre2-8-0_10.36-2_armel.deb /var/cache/apt/archives//libpcre3_2%3a8.39-13_armel.deb /var/cache/apt/archives//libselinux1_3.1-3_armel.deb /var/cache/apt/archives//libsmartcols1_2.36.1-8_armel.deb /var/cache/apt/archives//libssl1.1_1.1.1k-1+deb11u1_armel.deb /var/cache/apt/archives//libsystemd0_247.3-6_armel.deb /var/cache/apt/archives//libtinfo6_6.2+20201114-2_armel.deb /var/cache/apt/archives//libtirpc-common_1.3.1-1_all.deb /var/cache/apt/archives//libtirpc3_1.3.1-1_armel.deb /var/cache/apt/archives//libudev1_247.3-6_armel.deb /var/cache/apt/archives//libuuid1_2.36.1-8_armel.deb /var/cache/apt/archives//libzstd1_1.4.8+dfsg-2.1_armel.deb /var/cache/apt/archives//login_1%3a4.8.1-1_armel.deb /var/cache/apt/archives//lsb-base_11.1.0_all.deb /var/cache/apt/archives//mawk_1.3.4.20200120-2_armel.deb /var/cache/apt/archives//ncurses-base_6.2+20201114-2_all.deb /var/cache/apt/archives//ncurses-bin_6.2+20201114-2_armel.deb /var/cache/apt/archives//perl-base_5.32.1-4+deb11u2_armel.deb /var/cache/apt/archives//sed_4.7-1_armel.deb /var/cache/apt/archives//sysvinit-utils_2.96-7_armel.deb /var/cache/apt/archives//tar_1.34+dfsg-1_armel.deb /var/cache/apt/archives//util-linux_2.36.1-8_armel.deb /var/cache/apt/archives//zlib1g_1%3a1.2.11.dfsg-2_armel.deb failed
W: listening on child socket failed:
I: removing tempdir /tmp/mmdebstrap.VJaycRaHdt...
```
Package versions in Ubuntu 21.10:
* dpkg 1.20.9ubuntu2
* mmdebstrap 0.7.5-2.2
Upgrading mmdebstrap to 0.8.1-1 does not change the resulting error.
Unsetting LD_PRELOAD only prevents the warning about libgtk3-nocsd.so.0.