Can't install couchbase 1.3.13 gem on macOS

gem install couchbase
Building native extensions. This could take a while…
ERROR: Error installing couchbase:
ERROR: Failed to build gem native extension.

current directory: /Users/kirillmac/.rvm/gems/ruby-2.6.4/gems/couchbase-1.3.15/ext/couchbase_ext

/Users/kirillmac/.rvm/rubies/ruby-2.6.4/bin/ruby -I /Users/kirillmac/.rvm/rubies/ruby-2.6.4/lib/ruby/site_ruby/2.6.0 -r ./siteconf20200710-72757-9ri58a.rb extconf.rb
checking for lcb_iops_wire_bsd_impl2(NULL, 0) in -lcouchbase… yes
checking for mach/mach_time.h… yes
checking for stdint.h… yes
checking for sys/time.h… yes
checking for fcntl.h… yes
checking for sys/socket.h… yes
checking for errno.h… yes
checking for st_index_t… yes
checking for clock_gettime()… yes
checking for gettimeofday()… yes
checking for QueryPerformanceCounter()… no
checking for gethrtime()… no
checking for rb_hash_lookup2()… yes
checking for rb_thread_fd_select()… yes
checking for rb_thread_blocking_region()… no
checking for rb_thread_call_without_gvl()… yes
checking for poll() in poll.h… yes
checking for ppoll() in poll.h… no
checking for rb_fiber_yield()… yes
creating couchbase_config.h
creating Makefile

current directory: /Users/kirillmac/.rvm/gems/ruby-2.6.4/gems/couchbase-1.3.15/ext/couchbase_ext
make “DESTDIR=” clean

current directory: /Users/kirillmac/.rvm/gems/ruby-2.6.4/gems/couchbase-1.3.15/ext/couchbase_ext
make “DESTDIR=”
compiling arguments.c
In file included from arguments.c:18:
In file included from ./couchbase_ext.h:30:
In file included from /Users/kirillmac/.rvm/rubies/ruby-2.6.4/include/ruby-2.6.0/ruby.h:33:
/Users/kirillmac/.rvm/rubies/ruby-2.6.4/include/ruby-2.6.0/ruby/ruby.h:2186:35: warning: unused parameter ‘allow_transient’ [-Wunused-parameter]
rb_array_ptr_use_end(VALUE a, int allow_transient)
In file included from arguments.c:18:
./couchbase_ext.h:62:10: fatal error: ‘libcouchbase/n1ql.h’ file not found
#include <libcouchbase/n1ql.h>
1 warning and 1 error generated.
make: *** [arguments.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/kirillmac/.rvm/gems/ruby-2.6.4/gems/couchbase-1.3.15 for inspection.
Results logged to /Users/kirillmac/.rvm/gems/ruby-2.6.4/extensions/x86_64-darwin-19/2.6.0/couchbase-1.3.15/gem_make.out

@KirillKryloff ruby 1.3 SDK reached EOL in 2016 so its currently unsupported.

Maybe you can try new ruby SDK, which has different API, but is officially supported.

At this stage it is in preview mode, so you have to add --pre when you install the library

gem install --pre couchbase

API docs:
Code samples: