diff --git a/qad/QADDeploy.cmake b/qad/QADDeploy.cmake
index 13d757e..5a1cb71 100644
--- a/qad/QADDeploy.cmake
+++ b/qad/QADDeploy.cmake
@@ -28,8 +28,8 @@
 #  library search path
 #
 macro(deploy_target _T full_app_name version icon label copyright info)
-	set(_DESTINATION)
-	set(_DEPLOY_DIR)
+	set(_DESTINATION "${CMAKE_INSTALL_PREFIX}")
+	set(_DEPLOY_DIR "${CMAKE_INSTALL_PREFIX}")
 	set(_is_dest 0)
 	set(_is_deploy_dir 0)
 	foreach(_i ${ARGN})
@@ -77,7 +77,7 @@ macro(deploy_target _T full_app_name version icon label copyright info)
 		set(MACOSX_BUNDLE_INFO_STRING		   "${info}")
 		set(MACOSX_BUNDLE_BUNDLE_VERSION	   "6.0")
 		set_target_properties(${_T} PROPERTIES MACOSX_BUNDLE TRUE)
-		set(_AGD "${_DEPLOY_DIR}${_T}.app")
+		set(_AGD "${_DEPLOY_DIR}/${_T}.app")
 		set(_DMG "${CMAKE_CURRENT_BINARY_DIR}/dmg")
 		add_custom_target(deploy
 			# gather .app dir
@@ -91,7 +91,7 @@ macro(deploy_target _T full_app_name version icon label copyright info)
 			COMMAND cp -r ${_AGD} ${_DMG}
 			COMMAND ln --symbolic /Applications ${_DMG}
 			# generate dmg
-			COMMAND genisoimage -quiet -V ${_T} -D -R -apple -no-pad -o ${_DESTINATION}${_TV}.dmg ${_DMG}
+			COMMAND genisoimage -quiet -V ${_T} -D -R -apple -no-pad -o ${_DESTINATION}/${_TV}.dmg ${_DMG}
 			COMMENT "Generating ${_TV}.dmg"
 			)
 	endif()