+NOT_THESE += areid_pass
+# Old-style I/O
+
+NOT_THESE += north_lias
+# Deliberately causes divide by zero, and
+# we can't catch that yet
+
+NOT_THESE += andy_cherry barton-mangler-bug cvh_unboxing dmgob_native1 dmgob_native2 fast2haskell fexport jtod_circint okeefe_neural
+# doesn't compile
+
+NOT_THESE += jeff-bug lennart_array
+# compiles but doesn't run
+
+NOT_THESE += dmgob_native1 dmgob_native2
+# Native library doens't exist