diff --git a/src/build_mozc.py b/src/build_mozc.py
index 19efcec..62291e7 100644
--- a/src/build_mozc.py
+++ b/src/build_mozc.py
@@ -986,22 +986,16 @@
 
 def BuildToolsMain(options, unused_args, original_directory_name):
   """The main function for 'build_tools' command."""
+  if not IsWindows():
+    logging.info('build_tools is deprecated on this platform.')
+    return
+
   build_tools_dir = os.path.join(GetRelPath(os.getcwd(),
                                             original_directory_name),
                                  SRC_DIR, 'build_tools')
-  # Build targets in this order.
-  if IsWindows():
-    build_tools_targets = [
-        'out_win/%s:build_tools' % options.configuration,
-    ]
-  else:
-    gyp_files = [
-        os.path.join(build_tools_dir, 'build_tools.gyp')
-    ]
-    build_tools_targets = []
-    for gyp_file in gyp_files:
-      (target, _) = os.path.splitext(os.path.basename(gyp_file))
-      build_tools_targets += ['%s:%s' % (gyp_file, target)]
+  build_tools_targets = [
+      'out_win/%s:build_tools' % options.configuration,
+  ]
 
   for build_tools_target in build_tools_targets:
     BuildMain(options, [build_tools_target], original_directory_name)
diff --git a/src/mozc_version_template.txt b/src/mozc_version_template.txt
index 5180b31..d566fea 100644
--- a/src/mozc_version_template.txt
+++ b/src/mozc_version_template.txt
@@ -1,6 +1,6 @@
 MAJOR=1
 MINOR=15
-BUILD=1914
+BUILD=1915
 REVISION=102
 # NACL_DICTIONARY_VERSION is the target version of the system dictionary to be
 # downloaded by NaCl Mozc.