--- a/cmake/external/ranges/CMakeLists.txt.orig	2020-02-06 12:12:05.613006285 +0100
+++ b/cmake/external/ranges/CMakeLists.txt	2020-02-06 12:12:20.200020349 +0100
@@ -7,7 +7,7 @@
 add_library(external_ranges INTERFACE IMPORTED GLOBAL)
 add_library(desktop-app::external_ranges ALIAS external_ranges)
 
-if (DESKTOP_APP_USE_PACKAGED)
+if (!DESKTOP_APP_USE_PACKAGED)
     find_package(range-v3 REQUIRED)
     target_link_libraries(external_ranges INTERFACE range-v3::range-v3)
 else()
@@ -23,4 +23,4 @@ if (WIN32)
         /experimental:preprocessor # need for range-v3 see https://github.com/ericniebler/range-v3#supported-compilers
         /wd5105 # needed for `/experimental:preprocessor`, suppressing C5105 "macro expansion producing 'defined' has undefined behavior"
     )
-endif()
\ No newline at end of file
+endif()