diff --git a/sdk_container/src/third_party/portage-stable/eclass/rust.eclass b/sdk_container/src/third_party/portage-stable/eclass/rust.eclass
index 46b441ba67..9ead9d0057 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/rust.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/rust.eclass
@@ -67,6 +67,9 @@ fi
 # @DESCRIPTION:
 # Definitive list of Rust slots and the associated LLVM slot, newest first.
 declare -A -g -r _RUST_LLVM_MAP=(
+	["9999"]=20
+	["1.86.0"]=19
+	["1.85.0"]=19
 	["1.84.1"]=19
 	["1.84.0"]=19
 	["1.83.0"]=19
@@ -89,6 +92,9 @@ declare -A -g -r _RUST_LLVM_MAP=(
 # While _RUST_LLVM_MAP stores useful info about the relationship between Rust and LLVM slots,
 # this array is used to store the Rust slots in a more convenient order for iteration.
 declare -a -g -r _RUST_SLOTS_ORDERED=(
+	"9999"
+	"1.86.0"
+	"1.85.0"
 	"1.84.1"
 	"1.84.0"
 	"1.83.0"