diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6dd10958d..10f1417b3 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -30,8 +30,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys:
@@ -48,6 +48,7 @@ jobs:
             export OMR_PATH="$CIRCLE_PROJECT_USERNAME/$CIRCLE_PROJECT_REPONAME/${CIRCLE_BRANCH:-$CIRCLE_TAG}"
             export OMR_FEED_URL="$CIRCLE_REPOSITORY_URL"
             export OMR_FEED_SRC="${CIRCLE_BRANCH:-$CIRCLE_TAG}"
+            sudo apt-get update
             sudo apt-get install -yq libelf-dev
             pyenv global 3.5.2
             sh build.sh prepare {tools,toolchain}/install -j2
@@ -90,8 +91,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys:
@@ -149,8 +150,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys:
@@ -208,8 +209,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys:
@@ -267,8 +268,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys:
@@ -326,8 +327,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys:
@@ -387,8 +388,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys:
@@ -446,8 +447,8 @@ jobs:
       - run:
           name: cache
           command: |
-            echo "cache 63 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
-            echo "cache 66 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
+            echo "cache 64 $OMR_KERNEL $OMR_TARGET" > /tmp/cache-target
+            echo "cache 67 $OMR_KERNEL $OMR_TARGET $OMR_VERSION" > /tmp/cache-version
 
       - restore_cache:
           keys: