diff --git a/builder/image-software.sh b/builder/image-software.sh
index 77a24218..3cab443d 100755
--- a/builder/image-software.sh
+++ b/builder/image-software.sh
@@ -135,7 +135,7 @@ pip --version
 pip3 --version
 
 echo_stamp "Install Rust"  # needed for cryptography module
-curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+RUSTUP_USE_HYPER=1 curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
 
 echo_stamp "Install and enable Butterfly (web terminal)"
 echo_stamp "Workaround for tornado >= 6.0 breaking butterfly"