[...]
> +(define-public prips
> +  (package
> +    (name "prips")
> +    (version "1.1.1")
> +    (source
> +     (origin
> +       (method url-fetch)
> +       (uri (string-append "https://devel.ringlet.net/files/sys/"
> +                           name "/" name "-" version ".tar.xz"))
> +       (sha256
> +        (base32 "1a33vbl4w603mk6mm5r3vhk87fy3dfk5wdpch0yd3ncbkg3fmvqn"))))
> +    (build-system gnu-build-system)

Add ‘(native-inputs `(("perl-test-harness" ,perl-test-harness)))’ such that
the makefile can find the 'prove' binary.

> +    (arguments
> +     `(#:make-flags (list (string-append "CC=" ,(cc-for-target)))

Add ‘#:test-target "test"’ here, as the makefile has a 'test' target
instead of a 'check' target.

> +       #:phases (modify-phases %standard-phases
> +                  (delete 'configure)
> +                  (delete 'check)

and remove the (delete 'check).

The package now builds successfully for me.

Greetings,
Maxime.