checking yaml.h usability... yes
checking yaml.h presence... yes
checking for yaml.h... yes
checking for library containing yaml_parser_initialize... -lyaml
configure: creating ./config.status
config.status: creating vars.config
....
==> fast_yaml (compile)
Compiling /home/raver7/data/ejabberd-19.05/deps/fast_yaml/c_src/fast_yaml.c
/home/raver7/data/ejabberd-19.05/deps/fast_yaml/c_src/fast_yaml.c:18:18: schwerwiegender Fehler: yaml.h: Datei oder Verzeichnis nicht gefunden
 #include <yaml.h>
                  ^
Kompilierung beendet.
ERROR: compile failed while processing /home/raver7/data/ejabberd-19.05/deps/fast_yaml: rebar_abort
make: *** [deps/.built] Fehler 1