diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index 8a4eac754..a5736125e 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="1:19.1.0~++rc4-1"
-export PIKA_PACKAGE_NAME="llvm-toolchain-19"
+export PIKA_PACKAGE_VERSION="3.1.1+dfsg-11"
+export PIKA_PACKAGE_NAME="openbabel"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"