Hi, In addition, I am also lost with this sequence:
1. dry-run openmpi list dependencies 2. do the wrong thing with the REPL 3. garbage collect 4. redo the dry-run and now the dependencies are not listed Sorry Konrad, ’package-output’ is definitively wrong. Worse, the items listed in the first dry-run and then downloaded are not in the store but not listed by dry-run neither. --8<---------------cut here---------------start------------->8--- $ guix build -n openmpi substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% 16.0 MB would be downloaded: /gnu/store/gm6d1vr75d4247bq834pks4ln8j3bm3l-psm2-11.2.86 /gnu/store/4i9xg8dwns6ksjcb2kxkxmj9100jl4x5-ucx-1.6.1 /gnu/store/977xygcarq06p8qsxkj686cxchf6m6pg-opensm-3.3.22 /gnu/store/hbamhqhm4vq8fp27v9qgyc9rr6pf7fyw-libnl-3.5.0 /gnu/store/1sw0s2a1ndqzvngmf1jsn19nwk96m9f9-rdma-core-33.1 /gnu/store/wlhizxq9xcfz7vdf5h75xcalabad81q6-libfabric-1.11.2 /gnu/store/y88fpc6jk6a4smxqjq0s835q5mximf02-linux-pam-1.5.1 /gnu/store/agmdf3ib9sx7wqpznxxyki0pdbyhi4p5-freeipmi-1.6.7 /gnu/store/b0x9j72z490kk0pld2ab4qa146gq4x00-numactl-2.0.14 /gnu/store/jfwfsq932r209myi2ybrhy1yzh86m6a7-json-c-0.14 /gnu/store/1s9gmhycv7xhzgym0w13rnbyv4irk2d7-hwloc-2.4.1-lib /gnu/store/vnyxs3vvzday63hk0qmlxfaq0wikc11h-munge-0.5.14 /gnu/store/4lnskfwx6s7k8d3gr3mdq1p27z784m1r-slurm-20.11.3 /gnu/store/yzs7m97m0d224qf1x8qxg1y3j5n29c3b-psm-3.3.20170428 /gnu/store/wqcbimmq44rk882hmkj99zh43jmamps2-openmpi-4.0.5-debug /gnu/store/g07826knh72xwsdvpim5k30pqzjkcry9-openmpi-4.0.5 --8<---------------cut here---------------end--------------->8--- --8<---------------cut here---------------start------------->8--- $ guix repl GNU Guile 3.0.5 Copyright (C) 1995-2021 Free Software Foundation, Inc. Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'. This program is free software, and you are welcome to redistribute it under certain conditions; type `,show c' for details. Enter `,help' for help. scheme@(guix-user)> ,use(gnu packages mpi) scheme@(guix-user)> ,use(guix store) scheme@(guix-user)> ,use(guix packages) scheme@(guix-user)> (with-store store (package-output store openmpi)) fetching path `/gnu/store/1s9gmhycv7xhzgym0w13rnbyv4irk2d7-hwloc-2.4.1-lib'... Downloading https://ci.guix.gnu.org/nar/lzip/1s9gmhycv7xhzgym0w13rnbyv4irk2d7-hwloc-2.4.1-lib... hwloc-2.4.1-lib 204KiB 513KiB/s 00:00 [##################]100.0% [..] $1 = "/gnu/store/g07826knh72xwsdvpim5k30pqzjkcry9-openmpi-4.0.5" scheme@(guix-user)> ,q --8<---------------cut here---------------end--------------->8--- --8<---------------cut here---------------start------------->8--- $ guix gc --8<---------------cut here---------------end--------------->8--- --8<---------------cut here---------------start------------->8--- $ guix build -n openmpi substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% 12.5 MB would be downloaded: /gnu/store/fbn395nfpbp4d4fr6jsbmwcx6n10kg16-python-minimal-3.8.2 /gnu/store/7hizrpdsqf6q3pjgzmi51r5vbzlijkw0-python-minimal-wrapper-3.8.2 --8<---------------cut here---------------end--------------->8--- --8<---------------cut here---------------start------------->8--- $ guix show openmpi | recsel -p dependencies | grep slurm + rdma-core@33.1 slurm@20.11.3 ucx@1.6.1 valgrind@3.16.1 $ guix gc -D /gnu/store/4lnskfwx6s7k8d3gr3mdq1p27z784m1r-slurm-20.11.3 finding garbage collector roots... deleting `/gnu/store/trash' deleting unused links... note: currently hard linking saves 13699.88 MiB $ guix gc --list-dead | grep slurm finding garbage collector roots... determining live/dead paths... $ guix gc --list-live | grep slurm finding garbage collector roots... determining live/dead paths... $ ls /gnu/store/4lnskfwx6s7k8d3gr3mdq1p27z784m1r-slurm-20.11.3 ls: cannot access '/gnu/store/4lnskfwx6s7k8d3gr3mdq1p27z784m1r-slurm-20.11.3': No such file or directory $ guix build -n openmpi 12.5 MB would be downloaded: /gnu/store/fbn395nfpbp4d4fr6jsbmwcx6n10kg16-python-minimal-3.8.2 /gnu/store/7hizrpdsqf6q3pjgzmi51r5vbzlijkw0-python-minimal-wrapper-3.8.2 --8<---------------cut here---------------end--------------->8--- Cheers, simon