these 3 derivations will be built:
  /nix/store/adnqs3ih9aq1s216pv43hyq3rj0w2qp2-yad-12.1.drv
  /nix/store/pz6y1xfli8sv3mhql2k7vdhdjxvqvmvs-mkvtoolnix-73.0.0.drv
  /nix/store/hdhmzjjyy8cfhgj86q8hq8w7qkzbwx1r-mpv-convert-script-2016-03-18.drv
these 19 paths will be fetched (13.8 MiB download, 81.2 MiB unpacked):
  /nix/store/vqwpdabzq63n1zjcaiipzywihnfzksw6-docbook-xsl-nons-1.79.2
  /nix/store/zdb8h5854d6y9ngik28i4yq3gr9c8v8g-fmt-7.1.3
  /nix/store/mfqz7001dg9k0zg6fx2ab4s8x6v5g9w0-fmt-7.1.3-dev
  /nix/store/dr4xny5jmhwz4f4r7bnln778g7j7h9iz-gst-plugins-base-1.20.3-dev
  /nix/store/v2kq7jf53q2wga1b153gn8p3spiy6d58-gstreamer-1.20.3-bin
  /nix/store/nvhxabhafmbysi3j456563vm21zf0yqr-gstreamer-1.20.3-dev
  /nix/store/n584ni2hpkf9kx4q701hykdlzh1c2933-gtest-1.12.1
  /nix/store/a8p0siz9y76z5khv64lpc7zq4gi17ddb-gtest-1.12.1-dev
  /nix/store/fcgg2vsn8ra74lrnyl79kpp6xfs539db-intltool-0.51.0
  /nix/store/l21ycmm1cyw08clnfgjmqff7nlqsxbgg-libebml-1.4.4
  /nix/store/4dmql07g9zg4jcipwz4dyhmmqzsxnkz8-libmatroska-1.7.1
  /nix/store/lgl2xjjq9f9pv723h22ba4cws3b9a5ss-netpbm-11.0.2
  /nix/store/2vwqqnqbq3rrgn462a29yzcgsld9vdpm-nlohmann_json-3.11.2
  /nix/store/bcqi1ki01vhdlq9578n6i4apkfk6w1r1-pugixml-1.13
  /nix/store/s371zk47xmdwz2d23c5a9vd77hs14hm6-qtmultimedia-5.15.7
  /nix/store/gpnr9av9613qnn9d6yzvj2c42a32vwjl-qtmultimedia-5.15.7-bin
  /nix/store/2yk4460jpnic7wfmvvv5mykhppls9zz9-qtmultimedia-5.15.7-dev
  /nix/store/1avy7491a77vfnwy70nd9p2qfyf14baw-source
  /nix/store/9vgwb49nmd2sm0cqvs7wy0xn3kgnjhja-source