diff --git a/configure.cmake b/configure.cmake
index ffd79c7c3a1..af6568b370e 100644
--- a/configure.cmake
+++ b/configure.cmake
@@ -484,11 +484,8 @@ qt_feature("developer-build" PRIVATE
 )
 qt_feature("no-prefix" PRIVATE
     LABEL "No prefix build"
-    # The var expansion on the right hand side is on purpose
-    # because the custom condition evaluator only expands the lhs
-    CONDITION (CMAKE_INSTALL_PREFIX STREQUAL "${QtBase_BINARY_DIR}")
-              OR CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT
-    AUTODETECT QT_FEATURE_developer_build
+    AUTODETECT NOT QT_WILL_INSTALL
+    CONDITION NOT QT_WILL_INSTALL
 )
 qt_feature("private_tests" PRIVATE
     LABEL "Developer build: private_tests"