title: Unable to install couchbase via pip: 'libcouchbase/couchbase.h' file not found
body: <p>I am having some trouble installing couchbase dependencies.</p>
  <p>First I installed v2 using brew:</p>
  <pre><code>brew install libcouchbase@2
  </code></pre>
  <p>This gave me v2.10.7. Then I tried to install the version I need:</p>
  <pre><code>pip install couchbase==2.5.5
  </code></pre>
  <p>But I keep having this issue:</p>
  <pre><code>ERROR: Command errored out with exit status 1:
  ...
  clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -I/usr/local/include -I/Users/.../.pyenv/versions/3.6.8/include/python3.6m -c src/exceptions.c -o build/temp.macosx-10.13-x86_64-3.6/src/exceptions.o
  In file included from src/exceptions.c:17:
  src/pycbc.h:193:10: fatal error: 'libcouchbase/couchbase.h' file not found
  #include &lt;libcouchbase/couchbase.h&gt;
           ^~~~~~~~~~~~~~~~~~~~~~~~~~
  1 error generated.
  error: command 'clang' failed with exit status 1
  </code></pre>
  <p>Any ideas?</p>