lightning build fail with bet

bet.md

cc: error: cli/cli_main.o: No such file or directory
cc: error: cli/lightning-bet.o: No such file or directory
cc: error: common/configdir.o: No such file or directory
cc: error: common/json.o: No such file or directory
cc: error: common/json_escaped.o: No such file or directory
cc: error: common/version.o: No such file or directory
cc: error: ccan-asort.o: No such file or directory
cc: error: ccan-autodata.o: No such file or directory
cc: error: ccan-breakpoint.o: No such file or directory
cc: error: ccan-crypto-hmac.o: No such file or directory
cc: error: ccan-crypto-hkdf.o: No such file or directory
cc: error: ccan-crypto-ripemd160.o: No such file or directory
cc: error: ccan-crypto-sha256.o: No such file or directory
cc: error: ccan-crypto-shachain.o: No such file or directory
cc: error: ccan-crypto-siphash24.o: No such file or directory
cc: error: ccan-daemonize.o: No such file or directory
cc: error: ccan-err.o: No such file or directory
cc: error: ccan-fdpass.o: No such file or directory
cc: error: ccan-htable.o: No such file or directory
cc: error: ccan-ilog.o: No such file or directory
cc: error: ccan-io-io.o: No such file or directory
cc: error: ccan-intmap.o: No such file or directory
cc: error: ccan-io-poll.o: No such file or directory
cc: error: ccan-io-fdpass.o: No such file or directory
cc: error: ccan-isaac.o: No such file or directory
cc: error: ccan-isaac64.o: No such file or directory
cc: error: ccan-list.o: No such file or directory
cc: error: ccan-mem.o: No such file or directory
cc: error: ccan-noerr.o: No such file or directory
cc: error: ccan-opt-helpers.o: No such file or directory
cc: error: ccan-opt-parse.o: No such file or directory
cc: error: ccan-opt-usage.o: No such file or directory
cc: error: ccan-opt.o: No such file or directory
cc: error: ccan-pipecmd.o: No such file or directory
cc: error: ccan-ptr_valid.o: No such file or directory
cc: error: ccan-read_write_all.o: No such file or directory
cc: error: ccan-str-hex.o: No such file or directory
cc: error: ccan-str.o: No such file or directory
cc: error: ccan-take.o: No such file or directory
cc: error: ccan-tal-grab_file.o: No such file or directory
cc: error: ccan-tal-link.o: No such file or directory
cc: error: ccan-tal-path.o: No such file or directory
cc: error: ccan-tal-str.o: No such file or directory
cc: error: ccan-tal.o: No such file or directory
cc: error: ccan-time.o: No such file or directory
cc: error: ccan-timer.o: No such file or directory
cc: fatal error: no input files
compilation terminated.
cli/Makefile:14: recipe for target 'build-bet' failed
make: *** [build-bet] Error 1
make: *** Waiting for unfinished jobs....
Submodule path 'external/libbase58': checked out '1cb26b5bfff6b52995a2d88a4b7e1041df589d35'