On core-updates the package arc-theme fails:

starting phase `configure'
source directory: "/tmp/guix-build-arc-theme-20170302.drv-0/arc-theme-20170302" 
build directory: "/tmp/guix-build-arc-theme-20170302.drv-0/arc-theme-20170302"
configure flags: ("CONFIG_SHELL=/gnu/store/q19l04vd2za80mk1845pz7r8cz29qk43-bash
configure: WARNING: unrecognized options: --enable-fast-install
checking for a BSD-compatible install... /gnu/store/5s2nib1lrd2101bbrivcl17kjx1m
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /gnu/store/5s2nib1lrd2101bbrivcl17kjx1msp
checking for gawk... gawk
checking whether make sets $(MAKE)... no
checking whether make supports nested variables... yes
checking for pkg-config... /gnu/store/xyiyf12w4i7zf5g5b4ah0bi1mmd6i8xa-pkg-confi
checking pkg-config is at least version 0.9.0... yes
configure: error: Invalid GNOME version: 3.24

It seams that only GNOME versions until 3.22 are valid.

Nix has a workaround that sets the version down:

https://github.com/NixOS/nixpkgs/commit/165fa89762d7156bb3f2774cd3ff0d40cd0a9606

If I set the version hard to 3.22 the package builds again
successfully:

-     '(#:phases
+     '(#:configure-flags
+       '("--with-gnome=3.22")
+       #:phases

Is it legitimate to patch it like that or do we need more tests?

Björn