diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 115e9f34..dceb78a1 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -1,6 +1,6 @@
 name: ci
 
-on: [push, pull_request]
+on: [push]
 
 jobs:
   fmt:
diff --git a/ci/container/Dockerfile b/ci/container/Dockerfile
index 24acbcdd..d8a3528c 100644
--- a/ci/container/Dockerfile
+++ b/ci/container/Dockerfile
@@ -24,7 +24,7 @@ RUN apt-get install -y build-essential \
 RUN apt-get install -y gettext-base
 
 # Misc build dependencies.
-RUN apt-get install -y git rsync
+RUN apt-get install -y git rsync unzip
 
 # We need latest jq from debian buster for date support.
 RUN ARCH="$(dpkg --print-architecture)" && \