Build error on ubuntu 25.04, can't import "Walter logo.png"

Hi, I'm trying to compile cosmoe, but it fails when trying to find a resource with a space in the name:

[1/51] Generating src/apps/aboutsystem/aboutsystem resources with a custom command
FAILED: src/apps/aboutsystem/AboutSystem.rsrc 
/home/mglauche/prog/cosmoe-wayland/builddir/src/bin/rc/rc ../src/apps/aboutsystem/AboutSystem.rdef -o src/apps/aboutsystem/AboutSystem.rsrc -I . -I /home/mglauche/prog/cosmoe-wayland/builddir/data/artwork
rc: Error! ../src/apps/aboutsystem/AboutSystem.rdef:21 cannot import ../../../data/artwork/Walter logo.png
[2/51] Generating src/apps/guido/app resources with a custom command
FAILED: src/apps/guido/guido.rsrc 
/home/mglauche/prog/cosmoe-wayland/builddir/src/bin/rc/rc ../src/apps/guido/guido.rdef -o src/apps/guido/guido.rsrc -I . -I /home/mglauche/prog/cosmoe-wayland/builddir/data/artwork
rc: Error! ../src/apps/guido/guido.rdef:21 cannot import ../../../data/artwork/Walter logo.png
[3/51] Generating libtracker resources with a custom command
FAILED: libtracker.rsrc 
/home/mglauche/prog/cosmoe-wayland/builddir/src/bin/rc/rc ../src/kits/tracker/libtracker.rdef ../src/kits/tracker/TrackerIcons.rdef -o libtracker.rsrc -I . -I /home/mglauche/prog/cosmoe-wayland/builddir/src/kits/tracker
rc: Error! ../src/kits/tracker/TrackerIcons.rdef:35 cannot open include TrackerIcons.h
[4/51] Generating src/apps/minimal-noui/aboutsystem resources with a custom command
FAILED: src/apps/minimal-noui/minimal-noui.rsrc 
/home/mglauche/prog/cosmoe-wayland/builddir/src/bin/rc/rc ../src/apps/minimal-noui/minimal-noui.rdef -o src/apps/minimal-noui/minimal-noui.rsrc -I . -I /home/mglauche/prog/cosmoe-wayland/builddir/data/artwork
rc: Error! ../src/apps/minimal-noui/minimal-noui.rdef:19 cannot import ../../../data/artwork/Walter logo.png
[18/51] Compiling C++ object src/apps/resedit/ResEdit.p/MiscEditors.cpp.o
ninja: build stopped: subcommand failed.