this derivation will be built:
  /nix/store/bpa7gm2v9wgaa4cnxdz7dfndqxyx119p-example-unfree-package-1.0.drv
building '/nix/store/bpa7gm2v9wgaa4cnxdz7dfndqxyx119p-example-unfree-package-1.0.drv'
example-unfree-package-1.0> patching sources
example-unfree-package-1.0> configuring
example-unfree-package-1.0> no configure script, doing nothing
example-unfree-package-1.0> building
example-unfree-package-1.0> no Makefile, doing nothing
example-unfree-package-1.0> installing
example-unfree-package-1.0> post-installation fixup
example-unfree-package-1.0> shrinking RPATHs of ELF executables and libraries in /nix/store/cy1aimylhfpakhdqh9s8jxq1m64fm0g4-example-unfree-package-1.0
example-unfree-package-1.0> strip is /nix/store/rkwixq2wda45gxx7zg1qh329zhkbvzzb-gcc-wrapper-11.3.0/bin/strip
example-unfree-package-1.0> stripping (with command strip and flags -S) in  /nix/store/cy1aimylhfpakhdqh9s8jxq1m64fm0g4-example-unfree-package-1.0/bin
example-unfree-package-1.0> patching script interpreter paths in /nix/store/cy1aimylhfpakhdqh9s8jxq1m64fm0g4-example-unfree-package-1.0
example-unfree-package-1.0> checking for references to /build/ in /nix/store/cy1aimylhfpakhdqh9s8jxq1m64fm0g4-example-unfree-package-1.0...

upload niks3: ok