That said there was no log file, but I've pulled since, so I pulled again and redid the test.
``
$ guix --version
guix (GNU Guix) 3546e97f38bb4dfa4c016cd7a20d4add277ca8f7
Copyright (C) 2019 the Guix authors
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
$ guix package -n -m example-inferior.scm
Computing Guix derivation for 'x86_64-linux'... \
The following derivation will be built:
/gnu/store/b5qmqrs7fjd0w7zh5zgm4an21v1alich-profile.drv
The following profile hook will be built:
/gnu/store/gkhfa4z16x4336pbi1ha7njgdpm680yf-guix-package-cache.drv
/guix package: error: exception thrown: #<condition &store-protocol-error [message: "build of `/gnu/store/b5qmqrs7fjd0w7zh5zgm4an21v1alich-profile.drv' failed" status: 100] 4a4c750>
$ guix build --log-file /gnu/store/b5qmqrs7fjd0w7zh5zgm4an21v1alich-profile.drv
guix build: error: no build log for '/gnu/store/b5qmqrs7fjd0w7zh5zgm4an21v1alich-profile.drv'
```
There is maybe an extra clue in guix environment output, regarding repl:
```
$ guix environment --ad-hoc -m example-inferior.scm
Computing Guix derivation for 'x86_64-linux'... |
The following derivation will be built:
/gnu/store/caqr64cryz42nh687mg8p7dnpjk3dhqn-profile.drv
The following profile hook will be built:
/gnu/store/gkhfa4z16x4336pbi1ha7njgdpm680yf-guix-package-cache.drv
building path(s) `/gnu/store/yd83jmcpivf6aqzbhx5qwv59fcv40wd9-guix-package-cache'
guix: repl: command not found
Try `guix --help' for more information.
Backtrace:
1 (primitive-load "/gnu/store/fgxq3d1zix70k2acrrcg1yn9qj0?")
0 (scm-error misc-error #f "~A ~S" ("inferior failed" #) #f)
ERROR: In procedure scm-error:
inferior failed "/gnu/store/2gln2fjds54kb97yxyz1mfa3hrrcrwlv-profile"
builder for `/gnu/store/gkhfa4z16x4336pbi1ha7njgdpm680yf-guix-package-cache.drv' failed with exit code 1
cannot build derivation `/gnu/store/caqr64cryz42nh687mg8p7dnpjk3dhqn-profile.drv': 1 dependencies couldn't be built
guix environment: error: exception thrown: #<condition &store-protocol-error [message: "build of `/gnu/store/caqr64cryz42nh687mg8p7dnpjk3dhqn-profile.drv' failed" status: 100] 52e43f0>
```