diff --git a/.circleci/config.yml b/.circleci/config.yml
index 02bc648..d13ad75 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,4 +1,4 @@
-version: 2
+version: 2.1
 jobs:
   build:
     docker:
@@ -7,16 +7,15 @@ jobs:
       - checkout
       - restore_cache:
           keys:
-            - v1-.stack-{{ checksum "stack.yaml" }}-{{ checksum "package.yaml" }}
-            - v1-.stack-{{ checksum "stack.yaml" }}
-            - v1-.stack-
+            - v1-stack-{{ checksum "stack.yaml.lock" }}
+            - v1-stack
       - run:
           name: Build dependencies
-          command: stack build --only-dependencies
+          command: stack --no-terminal build --only-dependencies
       - save_cache:
-          key: v1-.stack-{{ checksum "stack.yaml" }}-{{ checksum "package.yaml" }}
+          key: v1-stack-{{ checksum "stack.yaml.lock" }}
           paths:
             - ~/.stack/
       - run:
           name: Build package
-          command: stack build
+          command: stack --no-terminal build