* Clear the substitutes prior to running the test.

tests/logging.sh

 source common.sh
 
-rm -f $NIX_STATE_DIR/var/nix/
 $nixstore --gc
+$nixstore --clear-substitutes
 
 # Produce an escaped log file.
 $nixstore --log-type escapes -r -vv $($nixinstantiate dependencies.nix) 2> $TEST_ROOT/log.esc