gitlab: Fix build on FreeBSD

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

.gitlab-ci.yml

@@ -104,8 +104,8 @@ freebsd/x86-64:
   script:
   - mkdir -p obj && cd obj && cmake -DCMAKE_BUILD_TYPE=Debug
     -DWITH_SFTP=ON -DWITH_SERVER=ON -DWITH_ZLIB=ON --DWITH_PCAP=ON
-    -DUNIT_TESTING=ON ..
-    && make -j$(nproc) && ctest --output-on-failure
+    -DUNIT_TESTING=ON .. &&
+    make && ctest --output-on-failure
   tags:
   - freebsd
   except: