diff --git a/nix/build-all.py b/nix/build-all.py
index 1210904027..2633eedb82 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -145,7 +145,7 @@ HDF5_VERSION = "1.13.1"
 
 GMP_VERSION = "6.2.1"
 MPFR_VERSION = "3.1.6"  # latest is 4.1.0
-CGAL_VERSION = "5.6.x-branch"
+CGAL_VERSION = "v5.6.3"
 USD_VERSION = "23.05"
 TBB_VERSION = "2021.9.0"
 ROCKSDB_VERSION = "9.11.2"