modified   gnu/packages/base.scm
@@ -737,7 +737,11 @@ (define-public binutils
 
           ;; For some reason, the build machinery insists on rebuilding .info
           ;; files, even though they're already provided by the tarball.
-          #:make-flags #~'("MAKEINFO=true")))
+          #:make-flags #~'("MAKEINFO=true")
+          #:phases #~(modify-phases %standard-phases
+                       (add-after 'unpack 'hello
+                         (lambda _
+                           (pk 'hello))))))
    (native-inputs (list bison))                   ;needed to build 'gprofng'
    (synopsis "Binary utilities: bfd gas gprof ld")
    (description