diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 78203d163..556676a00 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -752,11 +752,13 @@ if ((NOT LIBDSDCC_FOUND OR LIBDSDCC_EXTERNAL) AND LIBMBE_FOUND)
 endif ((NOT LIBDSDCC_FOUND OR LIBDSDCC_EXTERNAL) AND LIBMBE_FOUND)
 
 if (LINUX AND (NOT LIBSIGMF_FOUND OR LIBSIGMF_EXTERNAL))
+    set(LIBSIGMF_LIBRARIES "${EXTERNAL_BUILD_LIBRARIES}/lib${LIB_SUFFIX}/liblibsigmf${CMAKE_SHARED_LIBRARY_SUFFIX}" CACHE INTERNAL "")
     ExternalProject_Add(libsigmf
             GIT_REPOSITORY https://github.com/f4exb/libsigmf.git
             GIT_TAG ${LIBSIGMF_TAG}
             PREFIX "${EXTERNAL_BUILD_LIBRARIES}/libsigmf"
             CMAKE_ARGS ${COMMON_CMAKE_ARGS} -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+            BUILD_BYPRODUCTS "${LIBSIGMF_LIBRARIES}"            
             TEST_COMMAND ""
             )
     ExternalProject_Get_Property(libsigmf install_dir)
@@ -764,7 +766,6 @@ if (LINUX AND (NOT LIBSIGMF_FOUND OR LIBSIGMF_EXTERNAL))
     set_global_cache(LIBSIGMF_FOUND ON)
     set(LIBSIGMF_EXTERNAL ON CACHE INTERNAL "")
     set(LIBSIGMF_INCLUDE_DIR "${install_dir}/include" CACHE INTERNAL "")
-    set(LIBSIGMF_LIBRARIES "${install_dir}/lib${LIB_SUFFIX}/liblibsigmf${CMAKE_SHARED_LIBRARY_SUFFIX}" CACHE INTERNAL "")
 endif (LINUX AND (NOT LIBSIGMF_FOUND OR LIBSIGMF_EXTERNAL))
 
 # For APT demodulator