diff --git a/build/build-py-static.sh b/build/build-py-static.sh
index 1e64af0..0003876 100755
--- a/build/build-py-static.sh
+++ b/build/build-py-static.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e
+
 ################################################################
 # Basic settings.
 ################################################################
diff --git a/build/builder/build-external.py b/build/builder/build-external.py
index 759e3ac..d30fb28 100644
--- a/build/builder/build-external.py
+++ b/build/builder/build-external.py
@@ -83,7 +83,7 @@ class BuilderBase:
         cc.e("this is a pure-virtual function.")
 
     def build_zlib(self):
-        file_name = 'zlilb{}.zip'.format(env.ver_zlib_number)
+        file_name = 'zlib{}.zip'.format(env.ver_zlib_number)
         self._build_zlib(file_name)
 
     def _download_zlib(self, file_name):
diff --git a/make.sh b/make.sh
index a412272..749fb39 100755
--- a/make.sh
+++ b/make.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+set -e
+
 PATH_ROOT=$(cd "$(dirname "$0")"; pwd)
 #CFG_FILE=config.json