diff --git a/tools/pylib/_boutcore_build/build-wheels.sh b/tools/pylib/_boutcore_build/build-wheels.sh
index 8a800ba67882b5fcec0fcae8b97945f618d7fefe..463d2ba0dcd60a95f80819dfae52982571cee442 100644
--- a/tools/pylib/_boutcore_build/build-wheels.sh
+++ b/tools/pylib/_boutcore_build/build-wheels.sh
@@ -1,6 +1,6 @@
 set -ex
 yum -y install fftw-devel netcdf-cxx-devel
-curl https://github.com/dschwoerer/multimpi/releases/download/v0.1/multimpi-0.1.tar.xz > multimpi.tar.gz
+curl https://github.com/dschwoerer/multimpi/releases/download/v0.1/multimpi-0.1.tar.gz > multimpi.tar.gz
 tar -xvf multimpi.tar.gz -C /usr/local
 MPIPATH=/usr/local/multimpi
 export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$MPIPATH/lib/