make: "var-op-shell.mk" line 28: warning: "echo "failed"; false" returned non-zero status
make: "var-op-shell.mk" line 34: warning: "false" returned non-zero status
make: "var-op-shell.mk" line 59: warning: "kill -14 $$" exited on a signal
/bin/no/such/command: not found
make: "var-op-shell.mk" line 65: warning: "/bin/no/such/command" returned non-zero status
stderr
exit status 0