Running phase: unpackPhase
unpacking sources
Running phase: patchPhase
patching sources
Running phase: configurePhase
configuring
no configure script, doing nothing
Running phase: installPhase
installing
buildFlags: 
WARNING:  You build with buildroot.
  Build root: /
  Bin dir: /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib/ruby/gems/2.7.0/bin
  Gem home: /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib/ruby/gems/2.7.0
  Plugins dir: /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib/ruby/gems/2.7.0/plugins
Successfully installed contracts-0.16.0
1 gem installed
/nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib/ruby/gems/2.7.0 /build
removed 'cache/contracts-0.16.0.gem'
removed directory 'cache'
/build
Running phase: fixupPhase
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0
rewriting symlink /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/nix-support/gem-meta/spec to be relative to /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0
strip is /nix/store/rkwixq2wda45gxx7zg1qh329zhkbvzzb-gcc-wrapper-11.3.0/bin/strip
stripping (with command strip and flags -S) in  /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/bin
patching script interpreter paths in /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0
/nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib/ruby/gems/2.7.0/gems/contracts-0.16.0/script/docs-release: interpreter directive changed from "#!/usr/bin/env bash" to "/nix/store/mysyx2ms2gm0n425gsz1hvwfk1jn1f9c-bash-5.1-p16/bin/bash"
/nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib/ruby/gems/2.7.0/gems/contracts-0.16.0/script/cucumber: interpreter directive changed from "#!/usr/bin/env bash" to "/nix/store/mysyx2ms2gm0n425gsz1hvwfk1jn1f9c-bash-5.1-p16/bin/bash"
/nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0/lib/ruby/gems/2.7.0/gems/contracts-0.16.0/script/docs-staging: interpreter directive changed from "#!/usr/bin/env bash" to "/nix/store/mysyx2ms2gm0n425gsz1hvwfk1jn1f9c-bash-5.1-p16/bin/bash"
checking for references to /build/ in /nix/store/19cqgy441xl8mhmpzxghbc3c9zvx2iwz-ruby2.7.6-contracts-0.16.0...