As of this commit:

$ echo "container proc:" `getconf _NPROCESSORS_ONLN` `getconf _NPROCESSORS_CONF`
container proc: 2 2

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
---
 .shippable.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.shippable.yml b/.shippable.yml
index 231c29b620..1e3ae35dd9 100644
--- a/.shippable.yml
+++ b/.shippable.yml
@@ -20,4 +20,4 @@ build:
   ci:
     - unset CC
     - ./configure ${QEMU_CONFIGURE_OPTS} --target-list=${TARGET_LIST}
-    - make -j2
+    - make -j$(($(getconf _NPROCESSORS_ONLN) + 1))
-- 
2.11.0