OTP_VERSION=19.3.3
OTP_SRC_SUM=0f7247dc50c8a81897823f54f4a6daa3269d29c192a7eb594ea38722f6bb3bf3
REBAR_VERSION=2.6.4
REBAR_SRC_SUM=577246bafa2eb2b2c3f1d0c157408650446884555bf87901508ce71d5cc0bd07
REBAR3_VERSION=3.4.2
REBAR3_SRC_SUM=f4d38d01671af6a7eb4777654d1543b42c873dad32046e444434c64d929fc789