Running phase: patchPhase
patching sources
Running phase: configurePhase
configuring
no configure script, doing nothing
Running phase: buildPhase
building
cpio: warning: skipped 268752 bytes of junk
xzcat: /nix/store/4l6pqyl0x5k2rjynijd6qxzfd91mn5fx-OSXUpd10.11.5.dmg: Unexpected end of input
cpio: premature end of file
Running phase: fixupPhase
post-installation fixup
shrinking RPATHs of ELF executables and libraries in /nix/store/hnfbrdw7z1g97jgagm1zr14icv4k08zv-facetimehd-firmware-1.43_5
patching script interpreter paths in /nix/store/hnfbrdw7z1g97jgagm1zr14icv4k08zv-facetimehd-firmware-1.43_5
checking for references to /build/ in /nix/store/hnfbrdw7z1g97jgagm1zr14icv4k08zv-facetimehd-firmware-1.43_5...