fix paramcache

Author: dignifiedquire

.circleci/config.yml

@@ -166,7 +166,7 @@ commands:
     steps:
       - run:
           name: Obtain filecoin groth parameters
-          command: ./paramcache --params-for-sector-sizes=1024
+          command: ./paramcache --params-for-sector-sizes='1024:4'
           no_output_timeout: 60m
   build_project:
     steps: