diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index a6e8dc13a5..b55bd9deac 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -382,7 +382,7 @@ jobs:
           envs: 'AUTOCONF_VERSION'
           usesh: true
           prepare: |
-            pkg_add bash git gmake autoconf gmp
+            pkg_add bash git gmake autoconf-2.71p0 gmp
 
           # Do the thing
           run: |