diff --git a/WORKSPACE b/WORKSPACE
index 56f5bba..9ba620d 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -214,3 +214,7 @@
     strip_prefix = "qboot-a5300c4949b8d4de2d34bedfaed66793f48ec948",
     urls = ["https://github.com/bonzini/qboot/archive/a5300c4949b8d4de2d34bedfaed66793f48ec948.tar.gz"],
 )
+
+# Load musl toolchain Smalltown sysroot tarball into external repository.
+load("//build/toolchain/musl-host-gcc:sysroot.bzl", "musl_sysroot_repositories")
+musl_sysroot_repositories()