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-rw-r--r--gnu/system/linux-container.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/gnu/system/linux-container.scm b/gnu/system/linux-container.scm
index c558f45769..3acc579a6b 100644
--- a/gnu/system/linux-container.scm
+++ b/gnu/system/linux-container.scm
@@ -57,7 +57,8 @@ containerized OS."
(source (file-system-device fs)))
(or (string=? target (%store-prefix))
(string=? target "/")
- (string-prefix? "/dev/" source)
+ (and (string? source)
+ (string-prefix? "/dev/" source))
(string-prefix? "/dev" target)
(string-prefix? "/sys" target))))
(operating-system-file-systems os)))