[phpMyAdmin Developers] Build failed in Jenkins: phpMyAdmin-documentation #1

[Jenkins Daemon]

See <https://ci.phpmyadmin.net/job/phpMyAdmin-documentation/1/>

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Started by user Michal Čihař
[EnvInject] - Loading node environment variables.
Building in workspace <https://ci.phpmyadmin.net/job/phpMyAdmin-documentation/ws/>
Cloning the remote Git repository
Cloning repository git://github.com/phpmyadmin/phpmyadmin.git
 > git init <https://ci.phpmyadmin.net/job/phpMyAdmin-documentation/ws/> # timeout=10
Fetching upstream changes from git://github.com/phpmyadmin/phpmyadmin.git
 > git --version # timeout=10
 > git -c core.askpass=true fetch --tags --progress git://github.com/phpmyadmin/phpmyadmin.git +refs/heads/*:refs/remotes/origin/*
 > git config remote.origin.url git://github.com/phpmyadmin/phpmyadmin.git # timeout=10
 > git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 > git config remote.origin.url git://github.com/phpmyadmin/phpmyadmin.git # timeout=10
Fetching upstream changes from git://github.com/phpmyadmin/phpmyadmin.git
 > git -c core.askpass=true fetch --tags --progress git://github.com/phpmyadmin/phpmyadmin.git +refs/heads/*:refs/remotes/origin/*
 > git rev-parse origin/master^{commit} # timeout=10
Checking out Revision 2b261afbd6c1fdc5ed28a21dbc9200aa31e3f8c5 (origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 2b261afbd6c1fdc5ed28a21dbc9200aa31e3f8c5
First time build. Skipping changelog.
[workspace] $ /bin/sh -xe /tmp/hudson7327210768778609883.sh
+ make -C doc linkcheck
make: Entering directory '<https://ci.phpmyadmin.net/job/phpMyAdmin-documentation/ws/doc'>
Makefile:12: *** The 'sphinx-build' command was not found. Make sure you have Sphinx installed, then set the SPHINXBUILD environment variable to point to the full path of the 'sphinx-build' executable. Alternatively you can add the directory with the executable to your PATH. If you don't have Sphinx installed, grab it from http://sphinx-doc.org/.  Stop.
make: Leaving directory '<https://ci.phpmyadmin.net/job/phpMyAdmin-documentation/ws/doc'>
Build step 'Execute shell' marked build as failure
[WARNINGS] Skipping publisher since build result is FAILURE