This artifact consists of an sbt project with a Scala implementation of Lumberhack as introduced in the corresponding paper. Lumberhack aims to improve the efficiency of programs by eliminating intermediate data structures. We provide a test suite containing all the examples in the paper and all the nofib benchmarks we have ported and presented in the paper. Related scripts in bash, R and Python to generate the figures and tables in the paper are also contained in this artifact.