runpath validation

[Catonano]

trying to build Granite
https://launchpad.net/granite

I get this error

validating RUNPATH of 1 binaries in
"/gnu/store/c7zrvx10p41g26q0l8jray6xc0lv4qn3-granite-0.4.0.1/bin"...
/gnu/store/c7zrvx10p41g26q0l8jray6xc0lv4qn3-granite-0.4.0.1/bin/granite-demo:
error: depends on 'libgranite.so.3', which cannot be found in RUNPATH
(
"/gnu/store/c7zrvx10p41g26q0l8jray6xc0lv4qn3-granite-0.4.0.1/lib"
"/gnu/store/rmjlycdgiq8pfy5hfi42qhw3k7p6kdav-glibc-2.25/lib"
"/gnu/store/dhc2iy059hi91fk55dcv79z09kp6500y-gcc-5.4.0-lib/lib"
"/gnu/store/33wnpkc00awp59nsr8anmm5d265gcg85-gtk+-3.22.6/lib"
"/gnu/store/r1zsyinrpcpfbcym5qrx6zbk6hwzxwnm-pango-1.40.3/lib"
"/gnu/store/jkx9mkw8j34jfnv0dqdbbzxdcx3mlfdg-atk-2.22.0/lib"
"/gnu/store/i0bjwdqvn0wixcwfpw254w0az17iysga-cairo-1.14.8/lib"
"/gnu/store/di54h9fw72m3y31vpkpgk71clccrpwy8-gdk-pixbuf+svg-2.36.3/lib"
"/gnu/store/0wps368gx0cn3ynrkbhzq5pxf75rng7y-glib-2.50.3/lib"
"/gnu/store/5bx1wrvp15sr8jvwhaxf1x69chmh4w0j-libgee-0.18.1/lib"
"/gnu/store/dhc2iy059hi91fk55dcv79z09kp6500y-gcc-5.4.0-lib/lib/gcc/x86_64-unknown-linux-gnu/5.4.0/../../..")

I kept the build older (with build -K) and lib/libgranite.so.3 does exist

$ /tmp/guix-build-granite-0.4.0.1.drv-0/build$ ls lib/
Application.c        Drawing/             granite.vapi     libgranite.so.3.0.1  Widgets/
CMakeFiles/          granite.h            GtkPatch/        Makefile
cmake_install.cmake  granite.pc           libgranite.so    Services/
config.h             granite_valac.stamp  libgranite.so.3  style-classes.c

So I though: if I disable runpath check, lib/libgranite.so.3 will be there, at runtime

So:

#:validate-runpath? #f

in this case the build succeeds but inspecting the built thing in the store I see

~$ ls /gnu/store/zv2c9mbs4q7f75p9xlgxs62fb5wmp3ac-granite-0.4.0.1/
bin/  include/  lib64/  share/

So now the folder is not lib anymore, it's lib64

Will lib/libgranite.so.3 be found ?

Thanks !

Ciao