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/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/bin
  Gem home: /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0
  Plugins dir: /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/plugins
Successfully installed letter_opener_web-2.0.0
1 gem installed
/nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0 /build
removed 'cache/letter_opener_web-2.0.0.gem'
removed directory 'cache'
/build
Running phase: fixupPhase
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0
rewriting symlink /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/nix-support/gem-meta/spec to be relative to /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0
strip is /nix/store/rkwixq2wda45gxx7zg1qh329zhkbvzzb-gcc-wrapper-11.3.0/bin/strip
stripping (with command strip and flags -S) in  /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/bin
patching script interpreter paths in /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0
/nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/gems/letter_opener_web-2.0.0/Rakefile: interpreter directive changed from "#!/usr/bin/env rake" to "/nix/store/a98m1vmmjdid16chcclf4cdqi9bi1710-ruby-2.7.6/bin/rake"
/nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/gems/letter_opener_web-2.0.0/script/pre-push: interpreter directive changed from "#!/bin/bash" to "/nix/store/mysyx2ms2gm0n425gsz1hvwfk1jn1f9c-bash-5.1-p16/bin/bash"
/nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/gems/letter_opener_web-2.0.0/bin/setup: interpreter directive changed from "#!/bin/bash" to "/nix/store/mysyx2ms2gm0n425gsz1hvwfk1jn1f9c-bash-5.1-p16/bin/bash"
/nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/gems/letter_opener_web-2.0.0/spec/dummy/bin/rake: interpreter directive changed from "#!/usr/bin/env ruby" to "/nix/store/a98m1vmmjdid16chcclf4cdqi9bi1710-ruby-2.7.6/bin/ruby"
/nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/gems/letter_opener_web-2.0.0/spec/dummy/bin/rails: interpreter directive changed from "#!/usr/bin/env ruby" to "/nix/store/a98m1vmmjdid16chcclf4cdqi9bi1710-ruby-2.7.6/bin/ruby"
/nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0/lib/ruby/gems/2.7.0/gems/letter_opener_web-2.0.0/spec/dummy/bin/setup: interpreter directive changed from "#!/usr/bin/env ruby" to "/nix/store/a98m1vmmjdid16chcclf4cdqi9bi1710-ruby-2.7.6/bin/ruby"
checking for references to /build/ in /nix/store/vnigp395pkzn6jv07a2pnjs5frql0v4i-ruby2.7.6-letter_opener_web-2.0.0...