diff --git a/ext/libelf/SConscript b/ext/libelf/SConscript
index e909279d2..2fae8c25f 100644
--- a/ext/libelf/SConscript
+++ b/ext/libelf/SConscript
@@ -88,8 +88,8 @@ ElfFile('libelf_fsize.c')
 ElfFile('libelf_msize.c')
 
 m4env = Environment(ENV=os.environ)
-m4env.Append(M4FLAGS='-DSRCDIR=%s' % Dir('.'))
-m4env['M4COM'] = 'cd ${SOURCE.rsrcdir} && $M4 $M4FLAGS $SOURCES > ${TARGET.abspath}'
+m4env.Append(M4FLAGS='-DSRCDIR=%s' % Dir('.').path)
+m4env['M4COM'] = '$M4 $M4FLAGS $SOURCES > $TARGET'
 m4env.M4(target=File('libelf_convert.c'),
          source=[File('elf_types.m4'), File('libelf_convert.m4')])
 m4env.M4(target=File('libelf_fsize.c'),