diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index fa16c5938..78622c0cd 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="5.15.1-1"
-export PIKA_PACKAGE_NAME="gtksourceview5"
+export PIKA_PACKAGE_VERSION="48~rc-1"
+export PIKA_PACKAGE_NAME="ptyxis"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"