--- a/js/src/moz.build
+++ b/js/src/moz.build
@@ -42,16 +42,19 @@ for gcfile in ['devtools/rootAnalysis', 
 
 for stlfile in ['jsdate.*', 'jsnum.*']:
     with Files(stlfile):
         BUG_COMPONENT = component_stl
 
 with Files('builtin/intl/*'):
     BUG_COMPONENT = component_intl
 
+if CONFIG['ENABLE_WASM_CRANELIFT']:
+    CONFIGURE_SUBST_FILES += ['rust/extra-bindgen-flags']
+
 if not CONFIG['JS_DISABLE_SHELL']:
     DIRS += [
         'rust',
         'shell',
     ]
 
     TEST_DIRS += [
         'gdb',

--- a/js/src/rust/moz.build
+++ b/js/src/rust/moz.build
@@ -13,18 +13,16 @@ if CONFIG['ENABLE_WASM_CRANELIFT']:
         features += ['cranelift_arm32']
     elif CONFIG['JS_CODEGEN_ARM64']:
         features += ['cranelift_arm64']
     else:
         features += ['cranelift_none']
 
 RustLibrary('jsrust', features)
 
-CONFIGURE_SUBST_FILES += ['extra-bindgen-flags']
-
 if CONFIG['JS_SHARED_LIBRARY']:
     FINAL_LIBRARY = 'js'
 
 if CONFIG['OS_ARCH'] == 'Darwin':
     # The Rust standard library references libresolv on macOS, so we need to
     # link it as a workaround. See also bug 1367932.
     OS_LIBS += ['-lresolv']
 elif CONFIG['OS_ARCH'] == 'WINNT':