c3-lang/libffi

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b71839a..f45efee 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -266,6 +266,7 @@ jobs:
             dejagnu
             mingw-w64-i686-gcc
             mingw-w64-i686-gcc-libs
+            unzip
 
       - run: |
           set -x