diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index e030f78c46b..df4181c4325 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -7674,6 +7674,8 @@ in
 
   llvmPackages_latest = llvmPackages_8;
 
+  lorri = throw "lorri is not stable yet. Please go to https://github.com/target/lorri and follow the installation instructions there, for the time being.";
+
   manticore = callPackage ../development/compilers/manticore { };
 
   mercury = callPackage ../development/compilers/mercury { };