Hello, I've been bit by this for some time already, but just thought now to look if the problem was known (it seems not!) and report it otherwise, so here is an example: --8<---------------cut here---------------start------------->8--- building /gnu/store/cld6pxi337zjh7r177vvfnqi1v5mwbhq-shepherd-containerd.scm.drv... The following builds are still in progress: /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv /gnu/store/cld6pxi337zjh7r177vvfnqi1v5mwbhq-shepherd-containerd.scm.drv /gnu/store/z5fiwm0srghdgadyglhphkl2d9p16qhl-linux-modules.drv /gnu/store/l0p2ks1zv4sqmska9aig4kf1vbx3xf7v-linux-module-database.drv applying 7 grafts for /gnu/store/4kkhyjyl80707ywi5ciy7qvh91d699g2-alsa-plugins-1.2.2.drv ... build of /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv failed View build log at '/var/log/guix/drvs/i4/694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv'. The following builds are still in progress: /gnu/store/4kkhyjyl80707ywi5ciy7qvh91d699g2-alsa-plugins-1.2.2.drv /gnu/store/z5fiwm0srghdgadyglhphkl2d9p16qhl-linux-modules.drv /gnu/store/l0p2ks1zv4sqmska9aig4kf1vbx3xf7v-linux-module-database.drv cannot build derivation `/gnu/store/yn1a2p3fszyxfgcvlvl2q9rn7l9pgshm-profile.drv': 1 dependencies couldn't be built building /gnu/store/fcwwmdrby872iia0hyqslc9zp9bk41yb-shepherd-dockerd.scm.drv... building /gnu/store/w076c88069a16in66jdybf4laby81hmq-shepherd-file-system--data.scm.drv... building /gnu/store/p7ad6vs4clm35zjs2hkwyv6w4nj8qp7c-shepherd-file-system--home.scm.drv... cannot build derivation `/gnu/store/c42qvzkkxbdajlr01qq2yg3bdj2dfw30-shepherd-mcron.scm.drv': 1 dependencies couldn't be built cannot build derivation `/gnu/store/cbkhf7pnghcb6ilcsyb28df6jsgiwdld-system.drv': 1 dependencies couldn't be built guix system: error: build of `/gnu/store/cbkhf7pnghcb6ilcsyb28df6jsgiwdld-system.drv' failed $ tail /var/log/guix/drvs/i4/694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/schedule-2.sh' -> `./tests/schedule-2.sh' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/schedule.sh' -> `./tests/schedule.sh' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/utils.scm' -> `./tests/utils.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/vixie-time.scm' -> `./tests/vixie-time.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/cron.in' -> `./src/cron.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/crontab.in' -> `./src/crontab.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron.in' -> `./src/mcron.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/base.scm' -> `./src/mcron/base.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/config.scm.in' -> `./src/mcron/config.scm.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/core.s --8<---------------cut here---------------end--------------->8--- The failure is no where to be seen in the mcron build log. I've attempting to build a custom version of mcron with a local patch, and it probably is missing dev inputs such as autoconf and automake. Manually rebuilding the failed derivation lead to a correct build log: --8<---------------cut here---------------start------------->8--- $ guix build /gnu/store/c42qvzkkxbdajlr01qq2yg3bdj2dfw30-shepherd-mcron.scm.drvThe following derivations will be built: /gnu/store/c42qvzkkxbdajlr01qq2yg3bdj2dfw30-shepherd-mcron.scm.drv /gnu/store/4p3x9ad4mgm7dcaiqm7iji91z6g32kf4-mcron-job.drv /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv /gnu/store/7akn409y8j5f06n18c718mgwv67bpxaj-mcron-job.drv /gnu/store/f3igmc858xz671q9rfzjnrylml9rw30c-mcron-job.drv /gnu/store/g4p3rpr758kizzk386r043qj15s5n4w9-mcron-job.drv /gnu/store/vv023f5r962drsilnirv032rj655wsbd-mcron-job.drv /gnu/store/w8mrns4c5gbsc0lb5sd3069ph7salpnp-mcron-job.drv process 17285 acquired build slot '/var/guix/offload/127.0.0.1:6666/0' normalized load on machine '127.0.0.1' is 0.02 building /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv... guix offload: sending 0 store items (0 MiB) to '127.0.0.1'... offloading '/gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv' to '127.0.0.1'... offloading build of /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv to '127.0.0.1' @ build-started /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv - x86_64-linux /var/log/guix/drvs/i4//694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv 24663 starting phase `set-SOURCE-DATE-EPOCH' phase `set-SOURCE-DATE-EPOCH' succeeded after 0.0 seconds starting phase `set-paths' environment variable `PATH' set to `/gnu/store/krpyb0zi700dcrg9cc8932w4v0qivdg9-pkg-config-0.29.2/bin:/gnu/store/18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2/bin:/gnu/store/v6f44zccwh9z5zk3pjlywjybbi8n2hjh-tar-1.32/bin:/gnu/store/ncydgq2znms5n1d2k5yqshhf58nsixwv-gzip-1.10/bin:/gnu/store/i8h2pcxqdq07ijm3ibkka8f4smn1w48v-bzip2-1.0.8/bin:/gnu/store/9860f1abqj8wjjnwl8a9v54pdcc3bhgf-xz-5.2.4/bin:/gnu/store/60g7r3l01fd7c58yjbm6krgcwj1jkpwg-file-5.38/bin:/gnu/store/n4n560pfvvw50a9369axw5vj5rrqfj1n-diffutils-3.7/bin:/gnu/store/cd5qf3kcnlq35p9k392pjdpdzpsnds70-patch-2.7.6/bin:/gnu/store/hic7snhayfl7m6cpfqqr73nmm19bpqkg-findutils-4.7.0/bin:/gnu/store/swqdvwri9dbv6zssg6v0by7l05hd6wxp-gawk-5.0.1/bin:/gnu/store/ishk7fswcs4gkwcp8mh788z4mvvl9bxh-sed-4.8/bin:/gnu/store/bhs4rj58v8j1narb2454raan2ps38xd8-grep-3.4/bin:/gnu/store/57xj5gcy1jbl9ai2lnrqnpr0dald9i65-coreutils-8.32/bin:/gnu/store/hm40bxnv8jxmbc1lpb7zfimii4xm9m81-make-4.3/bin:/gnu/store/pwcp239kjf7lnj5i4lkdzcfcxwcfyk72-bash-minimal-5.0.16/bin:/gnu/store/mpa04aq8lblbcviyxywxcsb1zbi0mf39-ld-wrapper-0/bin:/gnu/store/m1z7cdbqsqyp9xnjw5cvlb4a7gkcg3m4-binutils-2.34/bin:/gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0/bin:/gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/bin:/gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/sbin' environment variable `PKG_CONFIG_PATH' set to `/gnu/store/18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2/lib/pkgconfig:/gnu/store/9860f1abqj8wjjnwl8a9v54pdcc3bhgf-xz-5.2.4/lib/pkgconfig:/gnu/store/35afkywncrr5xsb4cxcljf6rpjcb7f61-gmp-6.2.0/lib/pkgconfig:/gnu/store/zg126cjicrpm2p6zc08ra5vh4ddag7ww-libgc-8.0.4/lib/pkgconfig' environment variable `GUILE_LOAD_PATH' unset environment variable `GUILE_LOAD_COMPILED_PATH' unset environment variable `BASH_LOADABLES_PATH' unset environment variable `C_INCLUDE_PATH' set to `/gnu/store/18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2/include:/gnu/store/i8h2pcxqdq07ijm3ibkka8f4smn1w48v-bzip2-1.0.8/include:/gnu/store/9860f1abqj8wjjnwl8a9v54pdcc3bhgf-xz-5.2.4/include:/gnu/store/60g7r3l01fd7c58yjbm6krgcwj1jkpwg-file-5.38/include:/gnu/store/swqdvwri9dbv6zssg6v0by7l05hd6wxp-gawk-5.0.1/include:/gnu/store/hm40bxnv8jxmbc1lpb7zfimii4xm9m81-make-4.3/include:/gnu/store/m1z7cdbqsqyp9xnjw5cvlb4a7gkcg3m4-binutils-2.34/include:/gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0/include:/gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/include:/gnu/store/35afkywncrr5xsb4cxcljf6rpjcb7f61-gmp-6.2.0/include:/gnu/store/zg126cjicrpm2p6zc08ra5vh4ddag7ww-libgc-8.0.4/include:/gnu/store/i5a9qb07y9xjh9ry8hp6km43kji16nmd-libltdl-2.4.6/include:/gnu/store/4i9lvjz9z9j4kj412jpqv4zxjcik9qcb-libunistring-0.9.10/include:/gnu/store/gfapkk5c6hvl1d94m4sqnhn7f9l5gqyh-linux-libre-headers-5.4.20/include' environment variable `CPLUS_INCLUDE_PATH' set to `/gnu/store/18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2/include:/gnu/store/i8h2pcxqdq07ijm3ibkka8f4smn1w48v-bzip2-1.0.8/include:/gnu/store/9860f1abqj8wjjnwl8a9v54pdcc3bhgf-xz-5.2.4/include:/gnu/store/60g7r3l01fd7c58yjbm6krgcwj1jkpwg-file-5.38/include:/gnu/store/swqdvwri9dbv6zssg6v0by7l05hd6wxp-gawk-5.0.1/include:/gnu/store/hm40bxnv8jxmbc1lpb7zfimii4xm9m81-make-4.3/include:/gnu/store/m1z7cdbqsqyp9xnjw5cvlb4a7gkcg3m4-binutils-2.34/include:/gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0/include/c++:/gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0/include:/gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/include:/gnu/store/35afkywncrr5xsb4cxcljf6rpjcb7f61-gmp-6.2.0/include:/gnu/store/zg126cjicrpm2p6zc08ra5vh4ddag7ww-libgc-8.0.4/include:/gnu/store/i5a9qb07y9xjh9ry8hp6km43kji16nmd-libltdl-2.4.6/include:/gnu/store/4i9lvjz9z9j4kj412jpqv4zxjcik9qcb-libunistring-0.9.10/include:/gnu/store/gfapkk5c6hvl1d94m4sqnhn7f9l5gqyh-linux-libre-headers-5.4.20/include' environment variable `LIBRARY_PATH' set to `/gnu/store/18hp7flyb3yid3yp49i6qcdq0sbi5l1n-guile-3.0.2/lib:/gnu/store/i8h2pcxqdq07ijm3ibkka8f4smn1w48v-bzip2-1.0.8/lib:/gnu/store/9860f1abqj8wjjnwl8a9v54pdcc3bhgf-xz-5.2.4/lib:/gnu/store/60g7r3l01fd7c58yjbm6krgcwj1jkpwg-file-5.38/lib:/gnu/store/swqdvwri9dbv6zssg6v0by7l05hd6wxp-gawk-5.0.1/lib:/gnu/store/m1z7cdbqsqyp9xnjw5cvlb4a7gkcg3m4-binutils-2.34/lib:/gnu/store/fa6wj5bxkj5ll1d7292a70knmyl7a0cr-glibc-2.31/lib:/gnu/store/s3dcqzwqaakv1yx37by9chksdbkgih17-glibc-2.31-static/lib:/gnu/store/hwcky7446s952w0mwchhmm211ll07zrq-glibc-utf8-locales-2.31/lib:/gnu/store/35afkywncrr5xsb4cxcljf6rpjcb7f61-gmp-6.2.0/lib:/gnu/store/zg126cjicrpm2p6zc08ra5vh4ddag7ww-libgc-8.0.4/lib:/gnu/store/i5a9qb07y9xjh9ry8hp6km43kji16nmd-libltdl-2.4.6/lib:/gnu/store/4i9lvjz9z9j4kj412jpqv4zxjcik9qcb-libunistring-0.9.10/lib' environment variable `GUIX_LOCPATH' set to `/gnu/store/hwcky7446s952w0mwchhmm211ll07zrq-glibc-utf8-locales-2.31/lib/locale' phase `set-paths' succeeded after 0.0 seconds starting phase `install-locale' using 'en_US.utf8' locale for category "LC_ALL" phase `install-locale' succeeded after 0.0 seconds starting phase `unpack' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/.dir-locals.el' -> `./.dir-locals.el' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/.gitignore' -> `./.gitignore' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/.prev-version' -> `./.prev-version' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/AUTHORS' -> `./AUTHORS' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/ChangeLog' -> `./ChangeLog' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/ChangeLog.old' -> `./ChangeLog.old' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/HACKING' -> `./HACKING' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/Makefile.am' -> `./Makefile.am' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/NEWS' -> `./NEWS' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/README' -> `./README' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/TODO' -> `./TODO' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/bootstrap' -> `./bootstrap' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/configure.ac' -> `./configure.ac' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/maint.mk' -> `./maint.mk' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/COPYING' -> `./COPYING' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/base.scm' -> `./tests/base.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/basic.sh' -> `./tests/basic.sh' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/environment.scm' -> `./tests/environment.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/init.sh' -> `./tests/init.sh' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/job-specifier.scm' -> `./tests/job-specifier.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/schedule-2.sh' -> `./tests/schedule-2.sh' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/schedule.sh' -> `./tests/schedule.sh' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/utils.scm' -> `./tests/utils.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/tests/vixie-time.scm' -> `./tests/vixie-time.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/cron.in' -> `./src/cron.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/crontab.in' -> `./src/crontab.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron.in' -> `./src/mcron.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/base.scm' -> `./src/mcron/base.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/config.scm.in' -> `./src/mcron/config.scm.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/core.scm' -> `./src/mcron/core.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/environment.scm' -> `./src/mcron/environment.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/job-specifier.scm' -> `./src/mcron/job-specifier.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/redirect.scm' -> `./src/mcron/redirect.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/utils.scm' -> `./src/mcron/utils.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/vixie-specification.scm' -> `./src/mcron/vixie-specification.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/vixie-time.scm' -> `./src/mcron/vixie-time.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/scripts/cron.scm' -> `./src/mcron/scripts/cron.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/scripts/crontab.scm' -> `./src/mcron/scripts/crontab.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/src/mcron/scripts/mcron.scm' -> `./src/mcron/scripts/mcron.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/doc/config.texi.in' -> `./doc/config.texi.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/doc/mcron.texi' -> `./doc/mcron.texi' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/doc/fdl.texi' -> `./doc/fdl.texi' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/build-aux/announce-gen' -> `./build-aux/announce-gen' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/build-aux/do-release-commit-and-tag' -> `./build-aux/do-release-commit-and-tag' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/build-aux/gnu-web-doc-update' -> `./build-aux/gnu-web-doc-update' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/build-aux/gnupload' -> `./build-aux/gnupload' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/build-aux/guix.scm' -> `./build-aux/guix.scm' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/build-aux/pre-inst-env.in' -> `./build-aux/pre-inst-env.in' `/gnu/store/7k0zpwb8z6r4s5vsngb484yvvrjk8hx9-mcron-60c35df/build-aux/test-driver.scm' -> `./build-aux/test-driver.scm' phase `unpack' succeeded after 0.0 seconds starting phase `bootstrap' running './bootstrap' patch-shebang: ./bootstrap: changing `/bin/sh' to `/gnu/store/pwcp239kjf7lnj5i4lkdzcfcxwcfyk72-bash-minimal-5.0.16/bin/sh' + exec autoreconf -vfi ./bootstrap: line 5: exec: autoreconf: not found command "./bootstrap" failed with status 127 builder for `/gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv' failed with exit code 1 @ build-failed /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv - 1 builder for `/gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv' failed with exit code 1 derivation '/gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv' offloaded to '127.0.0.1' failed: build of `/gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv' failed build of /gnu/store/i4694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv failed View build log at '/var/log/guix/drvs/i4/694m53nk66izsy3rip2xqwpyaab0cf-mcron-1.2.1.drv'. cannot build derivation `/gnu/store/c42qvzkkxbdajlr01qq2yg3bdj2dfw30-shepherd-mcron.scm.drv': 1 dependencies couldn't be built guix build: error: build of `/gnu/store/c42qvzkkxbdajlr01qq2yg3bdj2dfw30-shepherd-mcron.scm.drv' failed --8<---------------cut here---------------end--------------->8--- So it seems to have to do when multiple builds are happening concurrently on the offload machine. Thanks, Maxim