this derivation will be built:
  /nix/store/zz6kd45xja01i6pz4x3djqzx6ggij81d-video-cutter-unstable-2021-02-03.drv
building '/nix/store/zz6kd45xja01i6pz4x3djqzx6ggij81d-video-cutter-unstable-2021-02-03.drv'
video-cutter-unstable-2021-02-03> unpacking sources
video-cutter-unstable-2021-02-03> unpacking source archive /nix/store/46hsik9z8ylvlg2vppxr5rh6vlva8pw4-source
video-cutter-unstable-2021-02-03> source root is source
video-cutter-unstable-2021-02-03> patching sources
video-cutter-unstable-2021-02-03> configuring
video-cutter-unstable-2021-02-03> no configure script, doing nothing
video-cutter-unstable-2021-02-03> installing
video-cutter-unstable-2021-02-03> post-installation fixup
video-cutter-unstable-2021-02-03> shrinking RPATHs of ELF executables and libraries in /nix/store/hryaj4pb4qy23664mnvh342v0d5aj205-video-cutter-unstable-2021-02-03
video-cutter-unstable-2021-02-03> patching script interpreter paths in /nix/store/hryaj4pb4qy23664mnvh342v0d5aj205-video-cutter-unstable-2021-02-03
video-cutter-unstable-2021-02-03> /nix/store/hryaj4pb4qy23664mnvh342v0d5aj205-video-cutter-unstable-2021-02-03/share/mpv/scripts/.c_concat.sh-wrapped: interpreter directive changed from "#!/bin/bash" to "/nix/store/mysyx2ms2gm0n425gsz1hvwfk1jn1f9c-bash-5.1-p16/bin/bash"
video-cutter-unstable-2021-02-03> checking for references to /build/ in /nix/store/hryaj4pb4qy23664mnvh342v0d5aj205-video-cutter-unstable-2021-02-03...

upload niks3: ok