Error on building lightning

[jorian]

Using dev branch, Ubuntu 16.04:

Submodule path 'external/libbase58': checked out '1cb26b5bfff6b52995a2d88a4b7e1041df589d35'
tools/generate-wire.py --bolt --printwire --header devtools/gen_print_wire.h wire_type < wire/gen_peer_wire_csv > devtools/gen_print_wire.h
cc -shared -o external/libcli.so  cli/cli_main.o cli/lightning-bet.o common/configdir.o common/json.o common/json_escaped.o common/version.o ccan-asort.o ccan-autodata.o ccan-breakpoint.o ccan-crypto-hmac.o ccan-crypto-hkdf.o ccan-crypto-ripemd160.o ccan-crypto-sha256.o ccan-crypto-shachain.o ccan-crypto-siphash24.o ccan-daemonize.o ccan-err.o ccan-fdpass.o ccan-htable.o ccan-ilog.o ccan-io-io.o ccan-intmap.o ccan-io-poll.o ccan-io-fdpass.o ccan-isaac.o ccan-isaac64.o ccan-list.o ccan-mem.o ccan-noerr.o ccan-opt-helpers.o ccan-opt-parse.o ccan-opt-usage.o ccan-opt.o ccan-pipecmd.o ccan-ptr_valid.o ccan-read_write_all.o ccan-str-hex.o ccan-str.o ccan-take.o ccan-tal-grab_file.o ccan-tal-link.o ccan-tal-path.o ccan-tal-str.o ccan-tal.o ccan-time.o ccan-timer.o 
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....

This happens when doing make on dev branch in ~/lightning

Master branch does not have this error