/usr/lib/mlton/sml/mlrisc-lib/alpha/ is in mlton-basis 20130715-3.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/mlton/sml/mlrisc-lib/alpha/README.alpha
/usr/lib/mlton/sml/mlrisc-lib/alpha/alpha.mdl
/usr/lib/mlton/sml/mlrisc-lib/alpha/backpatch/
/usr/lib/mlton/sml/mlrisc-lib/alpha/backpatch/alphaJumps.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/emit/
/usr/lib/mlton/sml/mlrisc-lib/alpha/emit/alphaAsm.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/emit/alphaMC.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/flowgraph/
/usr/lib/mlton/sml/mlrisc-lib/alpha/flowgraph/alphaGasPseudoOps.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaCells.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaFreqProps.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaInstr.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaPeephole.peep
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaPeephole.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaProps.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaShuffle.sig
/usr/lib/mlton/sml/mlrisc-lib/alpha/instructions/alphaShuffle.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/mltree/
/usr/lib/mlton/sml/mlrisc-lib/alpha/mltree/alpha.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/mltree/alphaPseudoInstr.sig
/usr/lib/mlton/sml/mlrisc-lib/alpha/mltree/alphaUtil.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/ra/
/usr/lib/mlton/sml/mlrisc-lib/alpha/ra/alphaRegAlloc.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/ra/alphaRewrite.sml
/usr/lib/mlton/sml/mlrisc-lib/alpha/ra/alphaSpillInstr.sml