Clone zlib-ng to build, not source directory

Author: ax3l

CMakeLists.txt

@@ -190,11 +190,10 @@ if(NOT DEACTIVATE_ZLIB)
         message(STATUS "Using ZLIB-NG external sources for ZLIB support.")
         include(FetchContent)
         FetchContent_Declare(z-ng
-                GIT_REPOSITORY    https://github.com/zlib-ng/zlib-ng
-                GIT_TAG 2.1.3
-                SOURCE_DIR        ${CMAKE_CURRENT_SOURCE_DIR}/internal-complibs/zlib-ng
-                SUBBUILD_DIR      internal-complibs/zlib-ng/subbuild
-                BINARY_DIR        internal-complibs/zlib-ng/build
+            GIT_REPOSITORY  https://github.com/zlib-ng/zlib-ng
+            GIT_TAG         2.1.3
+            SOURCE_DIR      ${PROJECT_BINARY_DIR}/blosc2-internal-complibs/zlib-ng
+            BUILD_IN_SOURCE 0
         )
         set(CMAKE_POSITION_INDEPENDENT_CODE ON)
         option(BUILD_SHARED_LIBS "" OFF)