these 23 derivations will be built:
  /nix/store/01gng11qd0z29lk2siq2rz9qfvsjcsvy-commander-4.4.3.gem.drv
  /nix/store/8s17bc38f5xh0k6dksmh7fffnzf00aim-indentation-0.1.1.gem.drv
  /nix/store/05q6z8s5jnlbwvlnf2gxy120a2722w0s-ruby2.7.6-indentation-0.1.1.drv
  /nix/store/9drjv2c5frfvannra2as7904dvg6wd8q-adts-0.1.2.gem.drv
  /nix/store/0bl8hbl0kpc9x83av41w05iavjmkk9y7-ruby2.7.6-adts-0.1.2.drv
  /nix/store/0vgxqvmkk288zcjzd3lzmm6h2c7fn012-ruby2.7.6-commander-4.4.3.drv
  /nix/store/xngxwkjs5qy7kjz275v7rrg6aa8n4i1z-contracts-0.16.0.gem.drv
  /nix/store/5w22ink4jbc5jm0sspkphv3427g11nsg-ruby2.7.6-contracts-0.16.0.drv
  /nix/store/s1r0sz2qrdmphyb729wj4md9491kblwd-elm_install-1.0.1.gem.drv
  /nix/store/89v4vw38hg3c03yrh7d2kv4p66ha21f2-ruby2.7.6-elm_install-1.0.1.drv
  /nix/store/ag0s1n5nlmvr1q0a4drdvgd7cf0dc9h0-ruby2.7.6-hashdiff-0.3.4.drv
  /nix/store/51q44skqygri81z3pnqj673vbbyvwchz-uri-ssh_git-2.0.0.gem.drv
  /nix/store/b1cwlrmkbgq3jvxxzlq69wflgmyd7bga-ruby2.7.6-uri-ssh_git-2.0.0.drv
  /nix/store/d7vbzxqqzykbri99rcfadzs3343wa69d-git_clone_url-2.0.0.gem.drv
  /nix/store/j64y9m61h8b1i4afhwkc8m9i5x3bafjm-ruby2.7.6-git_clone_url-2.0.0.drv
  /nix/store/jrygrwdhd1s2afak6lckn3f3widgdbpb-ruby2.7.6-highline-1.7.8.drv
  /nix/store/m9syaav0zxg6js9njmz6ybilyg2g930k-ruby2.7.6-semverse-2.0.0.drv
  /nix/store/46vkbximrybzbjbbp11rq6apqysnvmp5-smart_colored-1.1.1.gem.drv
  /nix/store/nsx8r9yj3ch8x0dkkr647x5q43qqd5rk-ruby2.7.6-smart_colored-1.1.1.drv
  /nix/store/qqmx4ivwzw65pmqa06dlafj3czijd60n-gemfile-and-lockfile.drv
  /nix/store/vm9qwlbf4vixlc8a9dxjysljkxxvl59v-ruby2.7.6-molinillo-0.5.7.drv
  /nix/store/z1dj1ki289217jlxnm006009apryn1sc-ruby2.7.6-solve-3.1.0.drv
  /nix/store/2qb7wdj9ivm73jr5qh0xq0r8z78na8rc-elm-github-install-1.0.1.drv
these 7 paths will be fetched (757.4 KiB download, 2.1 MiB unpacked):
  /nix/store/q144a0b9p1wml0b0ya2h12h81jaa2mrc-bundler-2.4.3
  /nix/store/bmxhck3yqk59lzjisrw0y9anygj4q1j4-hashdiff-0.3.4.gem
  /nix/store/maymbfw31w1gb2mmq17f5p6lhapyi2xg-highline-1.7.8.gem
  /nix/store/2ds12i7l4a4gjzz2mp4g4hkz47i3rc7w-molinillo-0.5.7.gem
  /nix/store/9cp7lwmn2mmvxjm4ipn1yhkssn8nhx5j-ruby2.7.6-git-1.3.0
  /nix/store/afcjmsc8abg2li6mg6y2gaykqagj5agz-semverse-2.0.0.gem
  /nix/store/yqmibpq55qhkrqsaw5s5qh6wnzy4fc05-solve-3.1.0.gem
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy