From Crippled Dove, 10 Months ago, written in Plain Text.
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  1. Affects: emacs build or linuxbrew install in a docker container
  2.  
  3. Problem:  Docker restricts access to certain host kernel system calls
  4.           to keep the container isolated.
  5.          
  6.           Mostly, this is fine, but it gets in the way of building emacs:
  7.          
  8.              https://github.com/moby/moby/issues/22801
  9.              
  10.           The fix is to spin up a docker container with the option below,
  11.           an then do the build:
  12.          
  13.               --security-opt seccomp=unconfined
  14.              
  15.           More details here:
  16.          
  17.               https://docs.docker.com/engine/security/seccomp/#significant-syscalls-blocked-by-the-default-profile