This happens with all the packages I have tried. For example, `guix pack --dry-run -R ghc:doc` fails with the message:
$ guix pack --dry-run -R ghc:doc guix pack: error: reference to invalid output 'doc' of derivation '/gnu/store/a0blj0d79mzgvb4fk8fkai51xjf68s7z-ghc-8.4.3R.drv' I get similar results if I change -R to -RR: $ guix pack --dry-run -RR ghc:doc guix pack: error: reference to invalid output 'doc' of derivation '/gnu/store/905g4g323i8ngdfnmqdgdm89z66ikj07-ghc-8.4.3R.drv' However, if I leave out the -R or -RR flag, it succeeds: $ guix pack --dry-run ghc:doc substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0% The following derivations would be built: /gnu/store/4qnslab7r748r44ydc3zcni0zgfsicak-tarball-pack.tar.gz.drv /gnu/store/p3k0xh40ypv7vnvd70jarswn0yykvi8m-profile.drv 0.0 MB would be downloaded: /gnu/store/sw8vw31fnmfrjhb32sxvvy0yxrx9s1hc-mkfontscale-1.2.1 /gnu/store/3rgvdjy72vqsv45f85b0phpirnzxb4w2-mkfontdir-1.0.7 The following profile hooks would be built: /gnu/store/1rlk94msgnanr5yyhmx5hck5b3xvsmxa-info-dir.drv /gnu/store/56qn66jcnwg8rkz7w0mfw0qkx1fx997n-ghc-package-cache.drv /gnu/store/8bpnr5pkzjnlj1zzrcjgr26x1yyyw82l-manual-database.drv /gnu/store/d7l70fw7zyg7mpkxnm87v69cphfi4s9z-fonts-dir.drv /gnu/store/f4xcbmbzzq32g8ywy8z96pyr89qni1g6-ca-certificate- bundle.drv The --dry-run flag is not necessary to replicate this bug. I included it to keep success output short and (hopefully) help narrow down when the bug happens. -- -Jesse
