install hiredis => arm directory or files doesn't exist

Hello, 

I'm trying an installation of Mastodon instance on tinkerboard running with Armbian OS.

I follow this topic : https://github.com/tootsuite/documentation/blob/master/Running-Mastodon/Production-guide.md

the last command i ran was 

bundle install -j$(getconf _NPROCESSORS_ONLN) --deployment --without development test

it returned me : 

Fetching: hiredis-0.6.1.gem (100%)
Building native extensions. This could take a while...
ERROR:  Error installing hiredis:
        ERROR: Failed to build gem native extension.

    current directory: /home/mastodon/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/hiredis-0.6.1/ext/hiredis_ext
/home/mastodon/.rbenv/versions/2.5.0/bin/ruby -r ./siteconf20180315-22972-ynlyve.rb extconf.rb
checking for sys/socket.h... yes
cc -std=c99 -pedantic -c -O3 -fPIC  -Wall -W -Wstrict-prototypes -Wwrite-strings -g -ggdb arm net.c
cc: error: arm: Aucun fichier ou dossier de ce type
Makefile:136 : la recette pour la cible « net.o » a échouée
make: *** [net.o] Erreur 1
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
        --with-opt-dir
        --without-opt-dir
        --with-opt-include
        --without-opt-include=${opt-dir}/include
        --with-opt-lib
        --without-opt-lib=${opt-dir}/lib
        --with-make-prog
        --without-make-prog
        --srcdir=.
        --curdir
        --ruby=/home/mastodon/.rbenv/versions/2.5.0/bin/$(RUBY_BASE_NAME)
extconf.rb:33:in `block in <main>': Building hiredis failed (RuntimeError)
        from extconf.rb:31:in `chdir'
        from extconf.rb:31:in `<main>'

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /home/mastodon/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/extensions/armv7l-linux/2.5.0-static/hiredis-0.6.1/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /home/mastodon/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/hiredis-0.6.1 for inspection.
Results logged to /home/mastodon/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/extensions/armv7l-linux/2.5.0-static/hiredis-0.6.1/gem_make.out

The problem seems to be that arm files or directory doesn't exist but i didn't find any issues. 

Anybody get an idea ?

Thanks a lot and i'm apologize to my English expression.