diff --git a/.travis.yml b/.travis.yml
index 855b57d..e1fcb36 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,5 +7,5 @@ before_install:
 
 script:
     # XXX: please chmod +x the shell script.
-    - sh ./scripts/macos_build.sh
-    - ./scripts/macos_post_build.sh
+    - bash ./scripts/macos_build.sh
+    - bash ./scripts/macos_post_build.sh
diff --git a/scripts/macos_build.sh b/scripts/macos_build.sh
index 150c338..86605c5 100644
--- a/scripts/macos_build.sh
+++ b/scripts/macos_build.sh
@@ -1,9 +1,8 @@
 #!/bin/sh
 
-set -Eeuxo pipefail
+set -Eexo pipefail
 
-export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
-export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/opt/openssl/lib/pkgconfig
+export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig:/usr/local/opt/openssl/lib/pkgconfig
 export PATH=$PATH:/usr/local/opt/qt5/bin:/usr/local/bin
 
 mkdir bass