Cannot build on Fedora 31

[leathersole]

mvn clean -DskipTests fabric8:deploy -Popenshift
This command fails with like this:

[INFO] --- fabric8-maven-plugin:3.5.40:build (default) @ spring-boot-cxf-jaxrs ---
[INFO] F8: Building Docker image in Kubernetes mode
[INFO] F8: Running generator spring-boot
[INFO] F8: spring-boot: Using Docker image fabric8/java-jboss-openjdk8-jdk:1.3 as base / builder
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.274 s
[INFO] Finished at: 2019-12-13T15:56:25+09:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal io.fabric8:fabric8-maven-plugin:3.5.40:build (default) on project spring-boot-cxf-jaxrs: Execution default of goal io.fabric8:fabric8-maven-plugin:3.5.40:build failed: No <dockerHost> given, no DOCKER_HOST environment variable, no read/writable '/var/run/docker.sock' or '//./pipe/docker_engine' and no external provider like Docker machine configured -> [Help 1]