diff --git a/build.sh b/build.sh
index e03522fd..34c2799b 100755
--- a/build.sh
+++ b/build.sh
@@ -2,19 +2,17 @@
 #
 
 if [ -f Makefile ]; then
-	#
-	# use existing automake files
-	#
-	echo >> /dev/null
+    # use existing automake files
+    echo >> /dev/null
 else
-	#
-	# regenerate automake files
-	#
+    # regenerate automake files
     echo "Running autotools..."
 
     autoheader \
         && aclocal \
-        && libtoolize --ltdl --copy --force \
+        && case \
+          $(uname) in Darwin*) glibtoolize --ltdl --copy --force ;; \
+          *) libtoolize --ltdl --copy --force ;; esac \
         && automake --add-missing --copy \
         && autoconf \
         && ./configure