> should use string-join instead of string-append Thanks for the suggestion, but I know that use of string-append is correct based on example code from https://guix.gnu.org/manual/en/html_node/Base-Services.html.
(define %example-udev-rule (udev-rule <https://guix.gnu.org/manual/en/html_node/Base-Services.html#index-udev_002drule> "90-usb-thing.rules" (string-append <https://www.gnu.org/software/guile/manual/html_node/Reversing-and-Appending-Strings.html#index-string_002dappend> "ACTION==\"add\", SUBSYSTEM==\"usb\", " "ATTR{product}==\"Example\", " "RUN+=\"/path/to/script\"")))
