diff --git a/blocks/boost/install/install.cmake b/blocks/boost/install/install.cmake
index ce5c3c5..682aa04 100644
--- a/blocks/boost/install/install.cmake
+++ b/blocks/boost/install/install.cmake
@@ -136,18 +136,20 @@ function(__BII_BOOST_INSTALL)
     set(BII_BOOST_DOWNLOAD_URL "http://sourceforge.net/projects/boost/files/boost/${BII_BOOST_VERSION}/${BII_BOOST_PACKAGE}" ${SCOPE})
 
     #Bootstrap
-    if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+    if((CMAKE_SYSTEM_NAME MATCHES "Windows") AND (NOT CMAKE_CROSSCOMPILING))
         set(__BII_BOOST_BOOSTRAPER ${BII_BOOST_DIR}/bootstrap.bat ${SCOPE})
         set(__BII_BOOST_B2         ${BII_BOOST_DIR}/b2.exe        ${SCOPE})
-        set(__DYNLIB_EXTENSION     .dll                           ${SCOPE})
-    elseif(CMAKE_SYSTEM_NAME MATCHES "Darwin")
+    else()
         set(__BII_BOOST_BOOSTRAPER ${BII_BOOST_DIR}/bootstrap.sh ${SCOPE})
         set(__BII_BOOST_B2         ${BII_BOOST_DIR}/b2           ${SCOPE})
-        set(__DYNLIB_EXTENSION     .dylib                        ${SCOPE})
+    endif()
+
+    if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+        set(__DYNLIB_EXTENSION     .dll   ${SCOPE})
+    elseif(CMAKE_SYSTEM_NAME MATCHES "Darwin")
+        set(__DYNLIB_EXTENSION     .dylib ${SCOPE})
     elseif(CMAKE_SYSTEM_NAME MATCHES "Linux")
-        set(__BII_BOOST_BOOSTRAPER ${BII_BOOST_DIR}/bootstrap.sh ${SCOPE})
-        set(__BII_BOOST_B2         ${BII_BOOST_DIR}/b2           ${SCOPE})
-        set(__DYNLIB_EXTENSION     .so                           ${SCOPE})
+        set(__DYNLIB_EXTENSION     .so    ${SCOPE})
     else()
         message(FATAL_ERROR "Unknown platform. Stopping Boost installation")
     endif()