diff --git a/packaging/build-conda/setup.sh b/packaging/build-conda/setup.sh
index 217bc64bf1..9609e5fb7d 100755
--- a/packaging/build-conda/setup.sh
+++ b/packaging/build-conda/setup.sh
@@ -1,3 +1,3 @@
 #! /bin/bash
 
-conda create --name cctools-build --yes --quiet --channel conda-forge --strict-channel-priority --experimental-solver=libmamba python=3 gcc_linux-64 gxx_linux-64 gdb m4 perl swig make zlib libopenssl-static openssl conda-pack cloudpickle packaging
+conda create --name cctools-build --yes --quiet --channel conda-forge --strict-channel-priority python=3 gcc_linux-64 gxx_linux-64 gdb m4 perl swig make zlib libopenssl-static openssl conda-pack cloudpickle packaging