➜  mix git:(greclipse) ✗ mvn clean install
[INFO] Scanning for projects...
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[INFO] ------------------------------------------------------------------------
[INFO] Building mix 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ mix ---
[INFO] Deleting /Users/m/git_repo/mix/target
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ mix ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.5.1:compile (default-compile) @ mix ---
[INFO] Changes detected - recompiling the module!
[INFO] Using Groovy-Eclipse compiler to compile both Java and Groovy files
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /Users/m/git_repo/mix/src/main/java/B.java:[7,1] 1. ERROR in /Users/m/git_repo/mix/src/main/java/B.java (at line 7)
        F.FBuilder builder = F.builder();
        ^^^^^^^^^^
F.FBuilder cannot be resolved to a type

[ERROR] /Users/m/git_repo/mix/src/main/java/B.java:[7,24] 2. ERROR in /Users/m/git_repo/mix/src/main/java/B.java (at line 7)
        F.FBuilder builder = F.builder();
                               ^^^^^^^
The method builder() is undefined for the type F
[ERROR] Found 2 errors and 0 warnings.
[INFO] 3 errors 
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
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[INFO] Total time: 1.532 s
[INFO] Finished at: 2016-05-11T09:13:09+02:00
[INFO] Final Memory: 13M/76M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.5.1:compile (default-compile) on project mix: Compilation failure: Compilation failure:
[ERROR] /Users/m/git_repo/mix/src/main/java/B.java:[7,1] 1. ERROR in /Users/m/git_repo/mix/src/main/java/B.java (at line 7)
[ERROR] F.FBuilder builder = F.builder();
[ERROR] ^^^^^^^^^^
[ERROR] F.FBuilder cannot be resolved to a type
[ERROR] 
[ERROR] /Users/m/git_repo/mix/src/main/java/B.java:[7,24] 2. ERROR in /Users/m/git_repo/mix/src/main/java/B.java (at line 7)
[ERROR] F.FBuilder builder = F.builder();
[ERROR] ^^^^^^^
[ERROR] The method builder() is undefined for the type F
[ERROR] 
[ERROR] Found 2 errors and 0 warnings.
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException