diff --git a/src/subbuild-mac-intel.sh b/src/subbuild-mac-intel.sh
index c86f068..3eb5b9b 100755
--- a/src/subbuild-mac-intel.sh
+++ b/src/subbuild-mac-intel.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 # Default flags
 CMFLAGS="-D CMAKE_BUILD_TYPE:STRING=Release"
 
diff --git a/src/subbuild-unix-unix.sh b/src/subbuild-unix-unix.sh
index a3a1e7a..09a2ae3 100755
--- a/src/subbuild-unix-unix.sh
+++ b/src/subbuild-unix-unix.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 # Default flags
 CMFLAGS="-D CMAKE_BUILD_TYPE:STRING=Release"
 
diff --git a/src/subbuild-unix-w32.sh b/src/subbuild-unix-w32.sh
index 703d023..5ffc6ec 100755
--- a/src/subbuild-unix-w32.sh
+++ b/src/subbuild-unix-w32.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e 
+
 # Default flags
 CMFLAGS="-D CMAKE_BUILD_TYPE:STRING=Release"