diff options
Diffstat (limited to 'gnu/build')
| -rw-r--r-- | gnu/build/activation.scm | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/gnu/build/activation.scm b/gnu/build/activation.scm index 10c9045740..eea2233563 100644 --- a/gnu/build/activation.scm +++ b/gnu/build/activation.scm @@ -363,9 +363,14 @@ second element is the name it should appear at, such as: "Tell the kernel to look for device firmware under DIRECTORY. This mechanism bypasses udev: it allows Linux to handle firmware loading directly by itself, without having to resort to a \"user helper\"." - (call-with-output-file "/sys/module/firmware_class/parameters/path" - (lambda (port) - (display directory port)))) + + ;; If the kernel was built without firmware loading support, this file + ;; does not exist. Do nothing in that case. + (let ((firmware-path "/sys/module/firmware_class/parameters/path")) + (when (file-exists? firmware-path) + (call-with-output-file firmware-path + (lambda (port) + (display directory port)))))) (define (activate-ptrace-attach) "Allow users to PTRACE_ATTACH their own processes. |