diff --git a/openhantek/CMakeLists.txt b/openhantek/CMakeLists.txt

index 255549a..f3f9402 100644

--- a/openhantek/CMakeLists.txt

+++ b/openhantek/CMakeLists.txt

@@ -17,7 +17,9 @@ INCLUDE_DIRECTORIES(".")

 find_package(Git)

-if (GIT_EXECUTABLE AND EXISTS "${CMAKE_SOURCE_DIR}/.git")

+if(DEFINED ENV{VERSION})

+    set(VERSION $ENV{VERSION})

+elseif (GIT_EXECUTABLE AND EXISTS "${CMAKE_SOURCE_DIR}/.git")

     execute_process(

         # delete the unstable tag ...

         # COMMAND ${GIT_EXECUTABLE} tag -d unstable