diff --git a/CMakeLists.txt b/CMakeLists.txt
index ee16948..a34fc25 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -309,7 +309,7 @@ list(APPEND LXW_PRIVATE_INCLUDE_DIRS ${ZLIB_INCLUDE_DIRS})
 
 # Set the minizip includes.
 if(USE_SYSTEM_MINIZIP)
-    if(MSVC)
+    if(1)
         find_package(MINIZIP NAMES unofficial-minizip REQUIRED)
         set(MINIZIP_LIBRARIES unofficial::minizip::minizip)
     else()
diff --git a/include/xlsxwriter/packager.h b/include/xlsxwriter/packager.h
index 8c465ad..ef95888 100644
--- a/include/xlsxwriter/packager.h
+++ b/include/xlsxwriter/packager.h
@@ -12,7 +12,7 @@
 
 #include <stdint.h>
 
-#ifdef USE_SYSTEM_MINIZIP
+#if 1
 #ifdef __GNUC__
 #pragma GCC system_header
 #endif