rc.6 seems to work only for now.

Dockerfile

@@ -14,7 +14,7 @@ ENV BUILD_DEPS="wget curl bzip2 build-essential python git ca-certificates"
 ENV GOSU_VERSION=1.10
 ENV NODE_VERSION ${NODE_VERSION:-v6.10.2}
 ENV METEOR_RELEASE ${METEOR_RELEASE:-1.4.5}
-ENV METEOR_EDGE ${METEOR_EDGE:-1.4.4-rc.9}
+ENV METEOR_EDGE ${METEOR_EDGE:-1.4.4-rc.6}
 ENV NPM_VERSION ${NPM_VERSION:-3.10.10}
 ENV ARCHITECTURE ${ARCHITECTURE:-linux-x64}
 ENV SRC_PATH ${SRC_PATH:-./}