c3-lang/libffi

diff --git a/.ci/install.sh b/.ci/install.sh
index 5dd9b08..446fed0 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -37,7 +37,7 @@ else
     sudo apt-get update
 
     set -x
-    wget --retry-connrefused --waitretry=1 --read-timeout=20 --timeout=15 -t 0 -qO https://ftpmirror.gnu.org/autoconf/autoconf-2.71.tar.gz | tar -xvzf -
+    wget --retry-connrefused --waitretry=1 --read-timeout=20 --timeout=15 -t 0 -qO - https://ftpmirror.gnu.org/autoconf/autoconf-2.71.tar.gz | tar -xvzf -
     mkdir -p ~/i
     (cd autoconf-2.71; ./configure --prefix=$HOME/i; make; make install)
 
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f7df5b6..8f9bcc5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -117,7 +117,7 @@ jobs:
 
       - name: Run autogen
         run: |
-          wget --retry-connrefused --waitretry=1 --read-timeout=20 --timeout=15 -t 0 -qO https://ftpmirror.gnu.org/autoconf/autoconf-2.71.tar.gz | tar -xvzf -
+          wget --retry-connrefused --waitretry=1 --read-timeout=20 --timeout=15 -t 0 -qO - https://ftpmirror.gnu.org/autoconf/autoconf-2.71.tar.gz | tar -xvzf -
           mkdir -p ~/i
           (cd autoconf-2.71; ./configure --prefix=$HOME/i; make; make install)
           rm -rf autoconf-2.71