Tried a system reconfigure of one of the GuixSD systems, after I synced with head, got this when it came to slim:
patching file app.cpp patching file panel.cpp Hunk #1 succeeded at 266 (offset 6 lines). patching file panel.cpp /gnu/store/ni491r4ffm03v0cr70df12lwiq826das-patch-2.7.5/bin/patch: **** malformed patch at line 17: @@ -52,6 +52,7 @@ source is under 'slim-1.3.6' applying '/gnu/store/33kil80w4wjpzxinv57qcb2igjrzhdyq-slim-config.patch'... applying '/gnu/store/n77my8565rm1fac5bh6ypy3cb2cm99yf-slim-reset.patch'... applying '/gnu/store/cf2zhy6daablf5fwm2ip3f33im75ndhy-slim-login.patch'... builder for `/gnu/store/250f9f7q4j5cj7xcp04rh97jkrfb50x3-slim-1.3.6.tar.xz.drv' failed to produce output path `/gnu/store/v6cpagdybgdj9pi3mgrv9l4315l1smki-slim-1.3.6.tar.xz' @ build-failed /gnu/store/250f9f7q4j5cj7xcp04rh97jkrfb50x3-slim-1.3.6.tar.xz.drv - 1 builder for `/gnu/store/250f9f7q4j5cj7xcp04rh97jkrfb50x3-slim-1.3.6.tar.xz.drv' failed to produce output path `/gnu/store/v6cpagdybgdj9pi3mgrv9l4315l1smki-slim-1.3.6.tar.xz' guix build: error: build failed: build of `/gnu/store/250f9f7q4j5cj7xcp04rh97jkrfb50x3-slim-1.3.6.tar.xz.drv' failed
