to recreate:
set
sbt.version=1.1.0
in project/build.properties
and run
sbt myKey
will produce an exception:
com.typesafe.config.ConfigException$UnresolvedSubstitution: module.conf: 8: Could not resolve substitution to a value: ${module1.App.Args.param1}
setting sbt.version=0.13.16
in project/build.properties
wil work properly