Revert "Try with older stack."
Revert "Try with older stack."

This reverts commit d32c27e1810c2645497f76b1a73f87d93222127f.

diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,HIPERFIT/futhark,diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,diku-dk/futhark