Use fibers 1.0.15 because 2.0.0 is broken.

Dockerfile

@@ -18,6 +18,7 @@ ENV METEOR_RELEASE ${METEOR_RELEASE:-1.4.4.1}
 ENV USE_EDGE ${USE_EDGE:-false}
 ENV METEOR_EDGE ${METEOR_EDGE:-1.5-beta.17}
 ENV NPM_VERSION ${NPM_VERSION:-4.6.1}
+ENV FIBERS_VERSION ${FIBERS_VERSION:-1.0.15}
 ENV ARCHITECTURE ${ARCHITECTURE:-linux-x64}
 ENV SRC_PATH ${SRC_PATH:-./}
 
@@ -79,7 +80,7 @@ RUN \
     # Install Node dependencies
     npm install -g npm@${NPM_VERSION} && \
     npm install -g node-gyp && \
-    npm install -g fibers && \
+    npm install -g fibers@{FIBERS_VERSION} && \
     \
     # Change user to wekan and install meteor
     cd /home/wekan/ && \