TODO: try to figure out if this patch is still needed, may be obsolete
https://bugs.gentoo.org/782553
--- a/tools/source2c
+++ b/tools/source2c
@@ -24,4 +24,5 @@
 name=$(basename "$input" | sed 's/\./_/')
 
+mkdir -p "$(dirname "$output")"
 cat >$output <<EOF
 // Generated from $input