diff --git a/build.cmd b/build.cmd
index b5721c0..a558756 100644
--- a/build.cmd
+++ b/build.cmd
@@ -2,6 +2,7 @@
 
 echo Executing rdmd ...
 rdmd --force --build-only -ofbin\dub.exe -g -debug -w -property -Isource curl.lib %* source\app.d
+if errorlevel 1 exit /b 1
 
 echo DUB has been built. You probably also want to add the following entry to your
 echo PATH environment variable:
diff --git a/build.sh b/build.sh
index a77010b..f8cc779 100755
--- a/build.sh
+++ b/build.sh
@@ -1,4 +1,6 @@
 #!/bin/sh
+set -e
+
 LIBS=`pkg-config --libs libcurl 2>/dev/null || echo "-lcurl"`
 LIBS=`echo "$LIBS" | sed 's/^-L/-L-L/; s/ -L/ -L-L/g; s/^-l/-L-l/; s/ -l/ -L-l/g'`