Mavenizer with AIR SDK 3.6 Could not create directory error

When generating maven artifacts with the mavenizer using Apache Flex 4.9 and AIR 3.6 we get this error

Exception in thread "main" java.lang.RuntimeException: Could not create director
y: D:\workspace\apache-fdk-maven-repository\com\adobe\flex\framework\themes\aeon
graphical\4.9.0.1425567
at flex.FlexFrameworkGenerator.generateThemeSwc(FlexFrameworkGenerator.j
ava:675)
at flex.FlexFrameworkGenerator.generateThemeArtifacts(FlexFrameworkGener
ator.java:614)
at flex.FlexFrameworkGenerator.process(FlexFrameworkGenerator.java:222)
at SDKGenerator.generateFlex(SDKGenerator.java:126)
at SDKGenerator.generateAllFlex(SDKGenerator.java:113)
at SDKGenerator.main(SDKGenerator.java:154)