diff -uNr rust/platform/triple_mappings.bzl rust/platform/triple_mappings.bzl
--- a/rust/platform/triple_mappings.bzl
+++ b/rust/platform/triple_mappings.bzl
@@ -1,6 +1,7 @@
 """Helpers for constructing supported Rust platform triples"""
 
 load("//rust/platform:triple.bzl", "triple")
+load("@@toolchains_llvm_bootstrapped+//constraints/libc:libc_versions.bzl", "DEFAULT_LIBC")
 
 def _support(*, std = False, host_tools = False):
     """Identify the type of support an associated platform triple has.
@@ -334,10 +335,11 @@
 
     all_abi_constraints = []
 
-    # add constraints for MUSL static compilation and linking
-    # to separate the MUSL from the non-MUSL toolchain on x86_64
-    # if abi == "musl" and system == "linux" and arch == "x86_64":
-    # all_abi_constraints.append("//rust/platform/constraints:musl_on")
+    if system == "linux":
+        if abi == "musl":
+            all_abi_constraints.append("@@toolchains_llvm_bootstrapped+//constraints/libc:musl")
+        elif abi.startswith("gnu"):
+            all_abi_constraints.append("@@toolchains_llvm_bootstrapped+//constraints/libc:{}".format(DEFAULT_LIBC))
 
     # add constraints for iOS + watchOS simulator and device triples
     if system in ["ios", "watchos"]: