diff --git a/.cirrus.yml b/.cirrus.yml
index b4b152d6..4a65e213 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -17,6 +17,7 @@ task:
   create_patch_script:
     - git clone https://github.com/jmacd/xdelta.git
     - cd xdelta/xdelta3
+    - apt-get update
     - export LC_CTYPE=en_US.UTF-8
     - export LC_ALL=en_US.UTF-8
     - sudo apt-get install -y automake autoconf libtool