diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index e2f4eac..4f3e0e8 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -15,7 +15,7 @@ jobs:
       with:
         enable-stack: true
         stack-no-global: true
-        stack-version: 'latest'
+        stack-version: latest
 
     - name: Cache
       uses: actions/cache@v2
@@ -24,8 +24,8 @@ jobs:
           ~/.stack
           graphql.cabal
           stack.yaml.lock
-        key: ${{ runner.os }}-build-${{ hashFiles('**/stack.yaml') }}
-        restore-keys: '${{ runner.os }}-build-'
+        key: ${{ runner.os }}-test-${{ hashFiles('**/stack.yaml') }}
+        restore-keys: ${{ runner.os }}-test-
 
     - name: Install dependencies
       run: stack --no-terminal test --only-snapshot
@@ -45,7 +45,7 @@ jobs:
       with:
         enable-stack: true
         stack-no-global: true
-        stack-version: 'latest'
+        stack-version: latest
 
     - name: Cache
       uses: actions/cache@v2
@@ -54,8 +54,8 @@ jobs:
           ~/.stack
           graphql.cabal
           stack.yaml.lock
-        key: ${{ runner.os }}-build-${{ hashFiles('**/stack.yaml') }}
-        restore-keys: '${{ runner.os }}-build-'
+        key: ${{ runner.os }}-lint-${{ hashFiles('**/stack.yaml') }}
+        restore-keys: ${{ runner.os }}-lint-
 
     - name: Build HLint
       run: stack --no-terminal build hlint
diff --git a/semaphoreci.sh b/semaphoreci.sh
deleted file mode 100755
index d7c8a93..0000000
--- a/semaphoreci.sh
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/bin/bash
-
-STACK=$SEMAPHORE_CACHE_DIR/stack
-export STACK_ROOT=$SEMAPHORE_CACHE_DIR/.stack
-
-setup() {
-	if [ ! -e "$STACK" ]
-	then
-		curl -L https://get.haskellstack.org/stable/linux-x86_64.tar.gz | tar xz --wildcards --strip-components=1 -C $SEMAPHORE_CACHE_DIR '*/stack'
-	fi
-	if [ -e "$SEMAPHORE_CACHE_DIR/graphql.cabal" ]
-	then
-		cp -a $SEMAPHORE_CACHE_DIR/graphql.cabal graphql.cabal
-	fi
-	$STACK --no-terminal setup
-	cp -a graphql.cabal $SEMAPHORE_CACHE_DIR/graphql.cabal
-}
-
-setup_test() {
-	$STACK --no-terminal test --only-snapshot
-}
-
-test() {
-	$STACK --no-terminal test --pedantic
-}
-
-test_docs() {
-	$STACK --no-terminal ghc -- -Wall -Werror -fno-code docs/tutorial/tutorial.lhs
-	$STACK --no-terminal haddock --no-haddock-deps
-}
-
-setup_lint() {
-	$STACK --no-terminal install hlint
-}
-
-lint() {
-	$STACK --no-terminal exec hlint -- src tests
-}
-
-$1