Hi Guix Development, I rely on the -C option below to compile ./pre-inst-env . guix environment -C guix (I learned the technique through https://gitlab.com/pjotrp/guix-notes/blob/master/INSTALL.org - ./pre-inst-env just won't compile correctly unless I follow the instructions on the page) However, this feature has become unavailable after the commit 8bc5ca5160db... ~/co/guix (master)$ guix environment -C guix guix environment: error: cannot create container: unprivileged user cannot create user namespaces guix environment: error: please set /proc/sys/kernel/unprivileged_userns_clone to "1" The commit details are below: commit 8bc5ca5160db3d82bd5b6b2b7ed80c96f42bd33e Author: Paul Garlick Date: Thu Dec 3 16:00:18 2020 +0000 linux-container: Correct test for unprivileged user namespace support. Fixes ;;. Reported by Paul Garlick . * gnu/build/linux-container.scm (unprivileged-user-namespace- supported?): Return #f when the 'userns-file' does not exist. diff --git a/gnu/build/linux-container.scm b/gnu/build/linux- container.scm index 4a8bed5a9a..3870b50907 100644 --- a/gnu/build/linux-container.scm +++ b/gnu/build/linux-container.scm @@ -44,7 +44,7 @@ (let ((userns-file "/proc/sys/kernel/unprivileged_userns_clone")) (if (file-exists? userns-file) (eqv? #\1 (call-with-input-file userns-file read-char)) - #t))) + #f))) (define (setgroups-supported?) "Return #t if the setgroups proc file, introduced in Linux-libre 3.19, I hope this is a bug that can be fixed. Otherwise, it looks like I won't be able to compile pre-inst-env? Cheers, Yasu