+if test "x$USER" = "x"; then USER="`id -un`"; fi
+
+# Check whether /etc/passwd and /etc/group are valid.
+guix environment -C --ad-hoc --bootstrap guile-bootstrap \
+ -- guile -c "(exit (string=? \"$USER\" (passwd:name (getpwuid (getuid)))))"
+guix environment -C --ad-hoc --bootstrap guile-bootstrap \
+ -- guile -c '(exit (string? (group:name (getgrgid (getgid)))))'
+guix environment -C --ad-hoc --bootstrap guile-bootstrap \
+ -- guile -c '(use-modules (srfi srfi-1))
+ (exit (every group:name
+ (map getgrgid (vector->list (getgroups)))))'
+
+# Make sure file-not-found errors in mounts are reported.
+if guix environment --container --ad-hoc --bootstrap guile-bootstrap \
+ --expose=/does-not-exist -- guile -c 1 2> "$tmpdir/error"
+then
+ false
+else
+ grep "/does-not-exist" "$tmpdir/error"
+ grep "[Nn]o such file" "$tmpdir/error"
+fi
+