gnu: traceroute: Use G-expressions.

* gnu/packages/networking.scm (traceroute)[arguments]:
Rewrite as G-expressions.

gnu/packages/networking.scm

@@ -4210,21 +4210,23 @@ network.  This must be enabled on the target host, usually in the BIOS.")
         (base32 "07svkglyizxirgcmv6d4ih59f3ds8pnyprvkrqcf5d3p567jcz2h"))))
     (build-system gnu-build-system)
     (arguments
-     `(#:tests? #f                      ;no test suite
+     (list
+      #:tests? #f                       ; no test suite
       #:make-flags
-       (list (string-append "LIBRARY_PATH="
+      #~(list (string-append "LIBRARY_PATH="
                              (assoc-ref %build-inputs "libc") "/lib")
               (string-append "CFLAGS=-I"
                              (assoc-ref %build-inputs "kernel-headers")
                              "/include")
               "LDFLAGS=-lm -L../libsupp"
-             (string-append "prefix=" (assoc-ref %outputs "out")))
+              (string-append "prefix=" #$output))
       #:phases
-       (modify-phases %standard-phases
+      #~(modify-phases %standard-phases
           (add-after 'unpack 'patch-make
             (lambda _
               (substitute* "default.rules"
-               ((" \\$\\(LIBDEPS\\)") "$(filter-out -l%,$(LIBDEPS))"))))
+                ((" \\$\\(LIBDEPS\\)")
+                 "$(filter-out -l%,$(LIBDEPS))"))))
           (delete 'bootstrap)           ; no configure.ac file
           (delete 'configure))))        ; no configure script
     (home-page "https://traceroute.sourceforge.net/")