--- a/cmake/external/expected/CMakeLists.txt
+++ b/cmake/external/expected/CMakeLists.txt
@@ -7,7 +7,7 @@
 add_library(external_expected INTERFACE IMPORTED GLOBAL)
 add_library(desktop-app::external_expected ALIAS external_expected)
 
-if (DESKTOP_APP_USE_PACKAGED)
+if (NOT DESKTOP_APP_USE_PACKAGED)
     if (DESKTOP_APP_USE_PACKAGED_LAZY)
         find_package(tl-expected QUIET)
     else()
--- a/cmake/external/gsl/CMakeLists.txt
+++ b/cmake/external/gsl/CMakeLists.txt
@@ -7,7 +7,7 @@
 add_library(external_gsl INTERFACE IMPORTED GLOBAL)
 add_library(desktop-app::external_gsl ALIAS external_gsl)
 
-if (DESKTOP_APP_USE_PACKAGED)
+if (NOT DESKTOP_APP_USE_PACKAGED)
     if (DESKTOP_APP_USE_PACKAGED_LAZY)
         find_package(Microsoft.GSL QUIET)
     else()
--- a/cmake/external/ranges/CMakeLists.txt
+++ b/cmake/external/ranges/CMakeLists.txt
@@ -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 (NOT DESKTOP_APP_USE_PACKAGED)
     if (DESKTOP_APP_USE_PACKAGED_LAZY)
         find_package(range-v3 QUIET)
     else()
--- a/cmake/external/webrtc/CMakeLists.txt
+++ b/cmake/external/webrtc/CMakeLists.txt
@@ -7,7 +7,7 @@
 add_library(external_webrtc INTERFACE IMPORTED GLOBAL)
 add_library(desktop-app::external_webrtc ALIAS external_webrtc)
 
-if (DESKTOP_APP_USE_PACKAGED)
+if (NOT DESKTOP_APP_USE_PACKAGED)
     find_package(tg_owt REQUIRED)
     target_link_libraries(external_webrtc INTERFACE tg_owt::tg_owt)
     return()