Cannot build via make build locally - make: *** [offline_themes] Error 1

[mocdaniel]

When trying to build the container locally with the changes of #42 applied to the source files, I get the following error message:

(base) daniel docker-icingaweb2  (master) >> make build
readlink: illegal option -- -
usage: readlink [-n] [file ...]
usage: dirname path
readlink: illegal option -- -
usage: readlink [-n] [file ...]
usage: dirname path 
mktemp: illegal option -- -
usage: mktemp [-d] [-q] [-t prefix] [-u] template ...
       mktemp [-d] [-q] [-u] -t prefix 
current directory: /Users/daniel/Repositories/docker-icingaweb2
json directory   : /build
hooks/offline_themes: line 20: local: -n: invalid option
local: usage: local name[=value] ...
RateLimit Remaining: 
sorry, API rate limit for github exceeded. (only  left)
make: *** [offline_themes] Error 1`

I am sorry for bothering but I am not an expert on Makefiles and how to fix this, any help would be appreciated.