--- a/src/bc/sconfig.h
+++ b/src/bc/sconfig.h
@@ -132,7 +132,9 @@
 #  define SCHEME_ARCH "x86_64"
 #  define REGISTER_POOR_MACHINE
 #  define ASM_DBLPREC_CONTROL_87
+#ifndef __ANDROID__
 #  define MZ_TRY_EXTFLONUMS
+#endif
 # endif
 # ifndef SCHEME_ARCH
 #  define SCHEME_ARCH "unknown"
@@ -154,14 +156,18 @@
 # define MZ_USE_JIT_I386
 # define MZ_JIT_USE_MPROTECT
 # ifndef MZ_NO_UNWIND_SUPPORT
+#ifndef __ANDROID__
 #  define MZ_USE_DWARF_LIBUNWIND
+#endif
 # endif
 #endif
 #if defined(__x86_64__)
 # define MZ_USE_JIT_X86_64
 # define MZ_JIT_USE_MPROTECT
 # ifndef MZ_NO_UNWIND_SUPPORT
+#ifndef __ANDROID__
 #  define MZ_USE_DWARF_LIBUNWIND
+#endif
 # endif
 #endif
 #if defined(__powerpc__) && !defined(__powerpc64__)