diff --git a/Rakefile b/Rakefile
index f99e143..b92a6bc 100644
--- a/Rakefile
+++ b/Rakefile
@@ -54,7 +54,7 @@ cflags << "-fshort-enums"
 # don't use system main definition (the starting point)
 cflags << "-ffreestanding"
 # don't use the standard library (only if you provide an alternative libc library)
-#cflags << "-nostdlib -nostdinc"
+cflags << "-nostdlib -nostdinc"
 # standard C library (use musl libc)
 cflags << "-I /usr/lib/musl/include/"
 # include own libraries
@@ -75,13 +75,13 @@ ldflags << "-nostartfiles"
 # only keep used sections
 ldflags << "--gc-sections"
 # don't use system libraries (only if you provide an alternative libc library)
-#ldflags << "-nostdlib -nostdinc"
+ldflags << "-nostdlib -nostdinc -nosys"
 # add standard libraries (for libc, libm, libnosys, libgcc) and libopencm3
 library_paths = ["/usr/arm-none-eabi/lib/armv7-m/", "/usr/lib/gcc/arm-none-eabi/*/armv7-m/", LIBOPENCM3_LIB]
 ldflags += library_paths.collect {|library_path| "--library-path #{library_path}"}
 ldflags *= ' '
 # used libraries (gcc provides the ARM ABI)
-ldlibs = [STM32F1_LIB, "c", "m", "nosys", "gcc"]
+ldlibs = [STM32F1_LIB, "m", "c", "nosys", "gcc"]
 ldlibs = ldlibs.collect {|library| "--library #{library}"}
 ldlibs *= ' '