diff --git a/.cirrus.yml b/.cirrus.yml
index e2cd173550..95df615f37 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -13,6 +13,7 @@ memory: &MEMORY 4GB
 config: &CONFIG --build-type=release --enable-cpp-tests --disable-broker-tests --prefix=$CIRRUS_WORKING_DIR/install
 static_config: &STATIC_CONFIG --build-type=release --enable-cpp-tests --disable-broker-tests --enable-static-broker --enable-static-binpac --prefix=$CIRRUS_WORKING_DIR/install
 sanitizer_config: &SANITIZER_CONFIG --build-type=debug --enable-cpp-tests --disable-broker-tests --sanitizers=address,undefined --enable-fuzzers --enable-coverage
+mobile_ipv6_config: &MOBILE_IPV6_CONFIG --build-type=release --enable-cpp-tests --enable-mobile-ipv6 --disable-broker-tests --prefix=$CIRRUS_WORKING_DIR/install
 
 resources_template: &RESOURCES_TEMPLATE
   cpu: *CPUS
@@ -181,6 +182,8 @@ ubuntu18_task:
     dockerfile: ci/ubuntu-18.04/Dockerfile
     << : *RESOURCES_TEMPLATE
   << : *CI_TEMPLATE
+  env:
+    ZEEK_CI_CONFIGURE_FLAGS: *MOBILE_IPV6_CONFIG
 
 ubuntu16_task:
   container: