these 13 derivations will be built:
  /nix/store/whf5sy0yiyz1nlby650nad46q2mn5v6i-source.drv
  /nix/store/226s6rphaycldlpdfw3f2z10iv5xbrwx-vcv-rtaudio-unstable-2020-01-30.drv
  /nix/store/498p3iyqmrz852jq0b2sb31av0zh6hfl-source.drv
  /nix/store/4p2l4bf7sk791kjrqkrlda9vq6qz80vs-source.drv
  /nix/store/995nijgycf1ygqjvim6czw0ic7nv54jm-source.drv
  /nix/store/9vpgyxwr6i0g3j8cxkl8kmmvi3rzghd3-source.drv
  /nix/store/a7p1gzzmhw7b3yycg04aq206xac28m35-VCV-Rack.desktop.drv
  /nix/store/bgiq7h9i7gc4jjjpm9aricw1yhgj81sb-source.drv
  /nix/store/bzwpdqlywwvx9jwn40lh74irg581vn57-source.drv
  /nix/store/kx59b4h6bgm2myh810cjxvixn43dxyd6-source.drv
  /nix/store/m04zgbkg64nz97b9ldlipcbpcvy7962b-source.drv
  /nix/store/miqsjkxzb34rjgq9k13sk0ak1865asxk-source.drv
  /nix/store/rlx51bk0i7hj7yrzkb297ddv51mi2a7f-VCV-Rack-2.2.1.drv
these 41 paths will be fetched (12.8 MiB download, 50.7 MiB unpacked):
  /nix/store/98xfqizl3j87yp8lj2ixzb558hch0f1r-acl-2.3.1-bin
  /nix/store/ssmjf0s84ypnrdcv991gklxa59jfwn1l-acl-2.3.1-dev
  /nix/store/wl9fmvlkfw56dv6ksfl1gqhkkgwgbnfy-djvulibre-3.5.28
  /nix/store/xcmdyacc2p7bxamj4sv3n78w2kk62vwz-djvulibre-3.5.28-bin
  /nix/store/xay8zmsdl81ci6qhqh036jblnfh0jy07-djvulibre-3.5.28-dev
  /nix/store/dl5yfmd8c0k03iy9i4vbpapmqc2igdb5-filesystem-1.5.12
  /nix/store/w7lmb480is4fkqp73sa2scfzv5rqd0vc-glfw-3.3.8
  /nix/store/fmr5c0m0zzgypbn3dv6f8bdgkf4ym2rc-ilmbase-2.5.8-dev
  /nix/store/9j0b5c0zakf93izqqgqd0v7hsfg4b6jc-imagemagick-7.1.0-57
  /nix/store/z8yypd8iax910476n7n60gahj0pwn9m6-imagemagick-7.1.0-57-dev
  /nix/store/5bk0wk110pyqdpr1imgqvgklbrplbzvw-imagemagick-7.1.0-57-doc
  /nix/store/s4jlagf4bng9fb3y1wsh0xcc1vkswair-jq-1.6-bin
  /nix/store/z2wi8rkz4gw8m4520sl72f905wdfjp4z-jq-1.6-dev
  /nix/store/66pyfsm68svrac1yk1di2njwh511s1nq-jq-1.6-lib
  /nix/store/p33xkabiyjvr0mgcdz1z4jpzlily55sf-lcms2-2.13.1-bin
  /nix/store/fyv5pvswyhmbn1qna2p4avs81v0liw23-lcms2-2.13.1-dev
  /nix/store/5n6cq0bg9dzppn8ivc4rj0w8zcb3038x-libarchive-3.6.1
  /nix/store/lkk7ly0qfhlqza6l5m4fxb148r89nid1-libarchive-3.6.1-dev
  /nix/store/yd3fyx5vsy21cglf2snrhn6zklpb6jzx-libheif-1.14.0-bin
  /nix/store/pgb1n6c51g86vmrzmz7sysfbks6v5khr-libheif-1.14.0-dev
  /nix/store/2jl4hbks60dg5qbyl3hmw9v0g3v4y75p-libhwy-1.0.2
  /nix/store/9mv456wmw698fhp2x65ci8g92qi7jdb2-libicns-0.8.1
  /nix/store/xwravhrb6r81f0h0ylycd2mrs0znl1j0-libjxl-0.7.0
  /nix/store/vczmgg1yf3ddcxx7hpmig8nxmfqd6f6r-libjxl-0.7.0-dev
  /nix/store/238sjxb2y8280cb5r32zp5c19ghd41cc-liblqr-1-0.4.2
  /nix/store/6r7qnjdil8d8dd4m03w0s8dy60mbns1m-liblqr-1-0.4.2-dev
  /nix/store/hnk5kj9wwzk82kpmjbivq9cn7b16i5xn-libraw-0.20.2.p2
  /nix/store/ddmwkgvgsg9bx7adnrhkwh0i9xgqk8zw-libraw-0.20.2.p2-dev
  /nix/store/v37m0z178plrcmf681gb2l8mpkz65p40-libraw-0.20.2.p2-lib
  /nix/store/73h6rzwm9yh6djbmvi5vwf1jcbgswcj7-librsvg-2.55.1-dev
  /nix/store/d54nbijaj7a7gxymc6wdd2210ipknf2a-libsamplerate-0.1.9
  /nix/store/lqskb1hyhzdqhrwbzzcmqwf5l8sqaim4-libsamplerate-0.1.9-bin
  /nix/store/xn5br012wprv6dby0zah1vk45awjx9gq-libsamplerate-0.1.9-dev
  /nix/store/cflbh86225w02k1gpbis7ibzkpj0by8k-onig-6.9.8
  /nix/store/70lnfgi17d6himbwchxy2pgq2jv0jm9d-openexr-2.5.8-bin
  /nix/store/9qmgyma73m8hklyp8dacjxbr9la6f5kf-openexr-2.5.8-dev
  /nix/store/66rir4ca9arlv0jhz6kj9libf879s230-openjpeg-2.5.0-dev
  /nix/store/7kxjdvj1nx9vc909xinlas4zjmiaq9f1-potrace-1.16
  /nix/store/6w9av77d0kqf582ndkqnnk0qcpsls3d5-rtmidi-5.0.0
  /nix/store/13hwzffb6hrsf2sa4xr7k8l7w7c6rx7p-source
  /nix/store/xdzy08xy7vxwxvq0r68wyh17g8n3h20a-speexdsp-1.2.1-dev