diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6ec5cce58..10ae7eca6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 # Boost 1.63 requires CMake 3.7 or newer
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 2.8)
 
 project(Slic3r)
 
diff --git a/cmake/modules/FindAlienWx.cmake b/cmake/modules/FindAlienWx.cmake
index 42efcc770..8e8a942a2 100644
--- a/cmake/modules/FindAlienWx.cmake
+++ b/cmake/modules/FindAlienWx.cmake
@@ -40,13 +40,13 @@ my \$defines      = ' ' . Alien::wxWidgets->defines;
 my \$cflags       = Alien::wxWidgets->c_flags;
 my \$linkflags    = Alien::wxWidgets->link_flags;
 my \$libraries    = ' ' . Alien::wxWidgets->libraries(@components);
-my @libraries     = Alien::wxWidgets->link_libraries(@components);
-my @implib        = Alien::wxWidgets->import_libraries(@components);
-my @shrlib        = Alien::wxWidgets->shared_libraries(@components);
-my @keys          = Alien::wxWidgets->library_keys; # 'gl', 'adv', ...
-my \$library_path = Alien::wxWidgets->shared_library_path;
-my \$key          = Alien::wxWidgets->key;
-my \$prefix       = Alien::wxWidgets->prefix;
+#my @libraries     = Alien::wxWidgets->link_libraries(@components);
+#my @implib        = Alien::wxWidgets->import_libraries(@components);
+#my @shrlib        = Alien::wxWidgets->shared_libraries(@components);
+#my @keys          = Alien::wxWidgets->library_keys; # 'gl', 'adv', ...
+#my \$library_path = Alien::wxWidgets->shared_library_path;
+#my \$key          = Alien::wxWidgets->key;
+#my \$prefix       = Alien::wxWidgets->prefix;
 
 my \$filename     = '${AlienWx_TEMP_INCLUDE}';
 open(my $fh, '>', \$filename) or die \"Could not open file '\$filename' \$!\";
diff --git a/xs/CMakeLists.txt b/xs/CMakeLists.txt
index bb2ff1aff..06757cf82 100644
--- a/xs/CMakeLists.txt
+++ b/xs/CMakeLists.txt
@@ -116,10 +116,10 @@ find_package(PerlEmbed REQUIRED)
 target_include_directories(XS PRIVATE ${PERL_INCLUDE_PATH})
 target_compile_options(XS PRIVATE ${PerlEmbed_CCFLAGS})
 # If the Perl is compiled with optimization off, disable optimization over the whole project.
-if ("-Od" IN_LIST PerlEmbed_CCFLAGS OR "/Od" IN_LIST PerlEmbed_CCFLAGS)
-    set(CMAKE_CXX_FLAGS_RELEASE /Od)
-    set(CMAKE_C_FLAGS_RELEASE /Od)
-endif()
+#if ("-Od" IN_LIST PerlEmbed_CCFLAGS OR "/Od" IN_LIST PerlEmbed_CCFLAGS)
+#    set(CMAKE_CXX_FLAGS_RELEASE /Od)
+#    set(CMAKE_C_FLAGS_RELEASE /Od)
+#endif()
 target_link_libraries(XS ${PERL_LIBRARY})
 
 ## REQUIRED packages