diff -urN mozjs-60.1.0.orig/python/mozbuild/mozbuild/backend/recursivemake.py mozjs-60.1.0/python/mozbuild/mozbuild/backend/recursivemake.py
--- mozjs-60.1.0.orig/python/mozbuild/mozbuild/backend/recursivemake.py	2018-06-19 00:24:03.000000000 +0200
+++ mozjs-60.1.0/python/mozbuild/mozbuild/backend/recursivemake.py	2019-01-27 15:47:21.573556544 +0100
@@ -1427,11 +1427,11 @@
                                 raise Exception("Wildcards are only supported in the filename part of "
                                                 "srcdir-relative or absolute paths.")
 
-                            install_manifest.add_pattern_link(basepath, wild, path)
+                            install_manifest.add_pattern_copy(basepath, wild, path)
                         else:
-                            install_manifest.add_pattern_link(f.srcdir, f, path)
+                            install_manifest.add_pattern_copy(f.srcdir, f, path)
                     else:
-                        install_manifest.add_link(f.full_path, dest)
+                        install_manifest.add_copy(f.full_path, dest)
                 else:
                     install_manifest.add_optional_exists(dest)
                     backend_file.write('%s_FILES += %s\n' % (