diff --git a/CMakeLists.txt b/CMakeLists.txt
index c25b2e470099f74948ca76fed81d54e1818bbcfc..45710eededcb1a5d73d99e7ad967fc2f66cfe53c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -141,6 +141,7 @@ ENABLE_TESTING()
 # -- INSTALL
 IF(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
     EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} -m site --user-site OUTPUT_VARIABLE PY_SITE OUTPUT_STRIP_TRAILING_WHITESPACE)
+    STRING(REGEX REPLACE "\\\\" "/" PY_SITE ${PY_SITE})
     SET(CMAKE_INSTALL_PREFIX "${PY_SITE}/waves" CACHE STRING "Install location" FORCE)
     SET(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT FALSE)
 ENDIF()
diff --git a/ext/amfe b/ext/amfe
index af19f7ab513ac3cb26b356b815abc71494a193a9..e4ae874992b92b2fb683d96833b714ddebff149b 160000
--- a/ext/amfe
+++ b/ext/amfe
@@ -1 +1 @@
-Subproject commit af19f7ab513ac3cb26b356b815abc71494a193a9
+Subproject commit e4ae874992b92b2fb683d96833b714ddebff149b