diff --git a/classes/rust-triples.bbclass b/classes/rust-triples.bbclass
new file mode 100644
index 0000000..1f67775
--- /dev/null
+++ b/classes/rust-triples.bbclass
@@ -0,0 +1,36 @@
+# Responseible for taking Yocto triples and converting it to Rust triples
+
+def rust_base_triple(d, thing):
+    '''
+    Mangle bitbake's *_SYS into something that rust might support (see
+    rust/mk/cfg/* for a list)
+
+    Note that os is assumed to be some linux form
+    '''
+
+    arch = d.getVar('{}_ARCH'.format(thing), True)
+    # All the Yocto targets are Linux and are 'unknown'
+    vendor = "-unknown"
+    os = d.getVar('{}_OS'.format(thing), True)
+    libc = d.getVar('TCLIBC', True)
+
+    # Prefix with a dash and convert glibc -> gnu
+    if libc == "glibc":
+        libc = "-gnu"
+    elif libc == "musl":
+        libc = "-musl"
+
+    # Don't double up musl (only appears to be the case on aarch64)
+    if os == "linux-musl":
+        if libc != "-musl":
+            bb.fatal("{}_OS was '{}' but TCLIBC was not 'musl'".format(thing, os))
+        os = "linux"
+
+    # This catches ARM targets and appends the necessary hard float bits
+    if os == "linux-gnueabi" or os == "linux-musleabi":
+        libc = bb.utils.contains('TUNE_FEATURES', 'callconvention-hard', 'hf', '', d)
+    return arch + vendor + '-' + os + libc
+
+RUST_BUILD_SYS = "${@rust_base_triple(d, 'BUILD')}"
+RUST_HOST_SYS = "${@rust_base_triple(d, 'HOST')}"
+RUST_TARGET_SYS = "${@rust_base_triple(d, 'TARGET')}"
diff --git a/classes/rust.bbclass b/classes/rust.bbclass
index 15299b2..0809186 100644
--- a/classes/rust.bbclass
+++ b/classes/rust.bbclass
@@ -1,8 +1,9 @@
 inherit rust-vars
+inherit rust-triples
 
 RUSTC = "rustc"
 
-RUSTC_ARCHFLAGS += "--target=${TARGET_SYS} ${RUSTFLAGS}"
+RUSTC_ARCHFLAGS += "--target=${HOST_SYS} ${RUSTFLAGS}"
 
 def rust_base_dep(d):
     # Taken from meta/classes/base.bbclass `base_dep_prepend` and modified to
@@ -17,36 +18,6 @@ def rust_base_dep(d):
 
 DEPENDS_append = " ${@rust_base_dep(d)} patchelf-native"
 
-def rust_base_triple(d, thing):
-    '''
-    Mangle bitbake's *_SYS into something that rust might support (see
-    rust/mk/cfg/* for a list)
-
-    Note that os is assumed to be some linux form
-    '''
-
-    arch = d.getVar('{}_ARCH'.format(thing), True)
-    vendor = d.getVar('{}_VENDOR'.format(thing), True)
-    os = d.getVar('{}_OS'.format(thing), True)
-
-    vendor = "-unknown"
-
-    if arch.startswith("arm"):
-        if os.endswith("gnueabi"):
-            os += bb.utils.contains('TUNE_FEATURES', 'callconvention-hard', 'hf', '', d)
-    elif arch.startswith("aarch64"):
-        os = "linux-gnu"
-    elif arch.startswith("x86_64"):
-        os = "linux-gnu"
-    elif arch.startswith("i586"):
-        arch = "i686"
-        os = "linux-gnu"
-    return arch + vendor + '-' + os
-
-RUST_BUILD_SYS = "${@rust_base_triple(d, 'BUILD')}"
-RUST_HOST_SYS = "${@rust_base_triple(d, 'HOST')}"
-RUST_TARGET_SYS = "${@rust_base_triple(d, 'TARGET')}"
-
 # BUILD_LDFLAGS
 # 	${STAGING_LIBDIR_NATIVE}
 # 	${STAGING_BASE_LIBDIR_NATIVE}