diff --git a/tools/build-kivy.sh b/tools/build-kivy.sh
index e303ea1..2fd6440 100755
--- a/tools/build-kivy.sh
+++ b/tools/build-kivy.sh
@@ -34,13 +34,13 @@ $HOSTPYTHON setup.py build_ext -g
 echo "cythoning =========================================="
 find . -name *.pyx -exec $KIVYIOSROOT/tools/cythonize.py {} \;
 echo "Second build ======================================="
-$HOSTPYTHON setup.py build_ext -g
-$HOSTPYTHON setup.py install -O2 --root iosbuild
+try $HOSTPYTHON setup.py build_ext -g
+try $HOSTPYTHON setup.py install -O2 --root iosbuild
 # Strip away the large stuff
 find iosbuild/ | grep -E '.*\.(py|pyc|so\.o|so\.a|so\.libs)$$' | xargs rm
 rm -rdf "$BUILDROOT/python/lib/python2.7/site-packages/kivy"
 # Copy to python for iOS installation
-cp -R "iosbuild/usr/local/lib/python2.7/site-packages/kivy" "$BUILDROOT/python/lib/python2.7/site-packages"
+try cp -R "iosbuild/usr/local/lib/python2.7/site-packages/kivy" "$BUILDROOT/python/lib/python2.7/site-packages"
 
 export LDSHARED="$OLD_LDSHARED"
 export CFLAGS="$OLD_CFLAGS"
diff --git a/tools/build-python.sh b/tools/build-python.sh
index f1291c7..f444377 100755
--- a/tools/build-python.sh
+++ b/tools/build-python.sh
@@ -42,13 +42,13 @@ echo "Building for iOS ======================================================="
 try patch -p1 < $KIVYIOSROOT/src/python_files/Python-$PYTHON_VERSION-xcompile.patch
 
 # set up environment variables for cross compilation
-export CPPFLAGS="-I$SDKROOT/usr/lib/gcc/arm-apple-darwin11/4.2.1/include/ -I$SDKROOT/usr/include/"
+export CPPFLAGS="-I$IOSSDKROOT/usr/lib/gcc/arm-apple-darwin11/4.2.1/include/ -I$IOSSDKROOT/usr/include/"
 export CPP="$CCACHE /usr/bin/cpp $CPPFLAGS"
 export MACOSX_DEPLOYMENT_TARGET=
 
 # make a link to a differently named library for who knows what reason
 mkdir extralibs||echo "foo"
-ln -s "$SDKROOT/usr/lib/libgcc_s.1.dylib" extralibs/libgcc_s.10.4.dylib || echo "sdf"
+ln -s "$IOSSDKROOT/usr/lib/libgcc_s.1.dylib" extralibs/libgcc_s.10.4.dylib || echo "sdf"
 
 # Copy our setup for modules
 try cp $KIVYIOSROOT/src/python_files/ModulesSetup Modules/Setup.local
diff --git a/tools/environment.sh b/tools/environment.sh
index 172ae6a..97561e4 100755
--- a/tools/environment.sh
+++ b/tools/environment.sh
@@ -8,10 +8,10 @@ try () {
 	"$@" || exit -1
 }
 
-# iOS SDK Environmnent
+# iOS SDK Environmnent (don't use name "SDKROOT"!!! it will break the compilation)
 export SDKVER=`xcodebuild -showsdks | fgrep "iphoneos" | tail -n 1 | awk '{print $2}'`
 export DEVROOT=`xcode-select -print-path`/Platforms/iPhoneOS.platform/Developer
-export SDKROOT=$DEVROOT/SDKs/iPhoneOS$SDKVER.sdk
+export IOSSDKROOT=$DEVROOT/SDKs/iPhoneOS$SDKVER.sdk
 
 if [ ! -d $DEVROOT ]; then
 	echo "Unable to found the Xcode iPhoneOS.platform"
@@ -51,9 +51,9 @@ export ARM_AR="$DEVROOT/usr/bin/ar"
 export ARM_LD="$DEVROOT/usr/bin/ld"
 export ARM_CFLAGS="-march=armv7 -mcpu=arm176jzf -mcpu=cortex-a8"
 export ARM_CFLAGS="$ARM_CFLAGS -pipe -no-cpp-precomp"
-export ARM_CFLAGS="$ARM_CFLAGS -isysroot $SDKROOT"
+export ARM_CFLAGS="$ARM_CFLAGS -isysroot $IOSSDKROOT"
 export ARM_CFLAGS="$ARM_CFLAGS -miphoneos-version-min=$SDKVER"
-export ARM_LDFLAGS="-isysroot $SDKROOT"
+export ARM_LDFLAGS="-isysroot $IOSSDKROOT"
 export ARM_LDFLAGS="$ARM_LDFLAGS -miphoneos-version-min=$SDKVER"
 
 # uncomment this line if you want debugging stuff
diff --git a/tools/liblink b/tools/liblink
index 7531ea9..be994f4 100755
--- a/tools/liblink
+++ b/tools/liblink
@@ -74,7 +74,7 @@ subprocess.call([
 '''
 subprocess.call([
 "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2",
-"-isysroot", environ.get('SDKROOT'),
+"-isysroot", environ.get('IOSSDKROOT'),
 "-r", "-march=armv7", "-mcpu=arm176jzf", "-mcpu=cortex-a8", "-o", output + ".o" ] + objects)
 '''