This message comes up because m2e doesn't know what to do at this phase. The build should work with command line maven, but m2e wants you to specify whether you want it to run the plugin or not.
The fix depends on what you want to happen. You can either have eclipse ignore the plugin or execute it as part of the build.
The documentation explains it in further detail here, but I'm copying the easy answer below.
https://www.eclipse.org/m2e/documentation/m2e-execution-not-covered.html
This changes the pom to add some eclipse metadata. If you're just trying to get it to build this will work.
HINT: Use quick fix to create “ignore” mapping, then replace
action with . M2Eclipse 1.3 and newer assume safer
runOnIncremental=false by default. It is recommended to always
specific desired runOnIncremental value explicitly in lifecycle
mapping configuration.
You can also change your preferences in newer eclipse/m2e versions. It's the other quick fix option. You can change this one under Project Properties->Maven->Lifecycle Mapping.