diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 069f1e6d7..d728fa3a2 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -781,6 +781,7 @@ if ((LINUX OR APPLE) AND (NOT LIBSIGMF_FOUND OR LIBSIGMF_EXTERNAL))
             GIT_REPOSITORY https://github.com/f4exb/libsigmf.git
             GIT_TAG ${LIBSIGMF_TAG}
             PREFIX "${EXTERNAL_BUILD_LIBRARIES}/libsigmf"
+            INSTALL_DIR "${EXTERNAL_BUILD_LIBRARIES}"
             CMAKE_ARGS ${COMMON_CMAKE_ARGS} -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
             UPDATE_DISCONNECTED TRUE
             PATCH_COMMAND sed -i "" -e "s/-Werror//g" -e "s/VERSION 2.8/VERSION 3.10/g" <SOURCE_DIR>/external/flatbuffers/CMakeLists.txt
@@ -793,8 +794,7 @@ if ((LINUX OR APPLE) AND (NOT LIBSIGMF_FOUND OR LIBSIGMF_EXTERNAL))
     set(LIBSIGMF_EXTERNAL ON CACHE INTERNAL "")
     set(LIBSIGMF_INCLUDE_DIR "${install_dir}/include" CACHE INTERNAL "")
     if (APPLE)
-        install(DIRECTORY "${binary_dir}/" DESTINATION "${INSTALL_LIB_DIR}"
-                FILES_MATCHING PATTERN "libsigmf*${CMAKE_SHARED_LIBRARY_SUFFIX}")
+        install(FILES "${LIBSIGMF_LIBRARIES}" DESTINATION "${INSTALL_LIB_DIR}")
         set(MACOS_EXTERNAL_LIBS_FIXUP "${MACOS_EXTERNAL_LIBS_FIXUP};${binary_dir}/")
     endif ()
 endif ((LINUX OR APPLE) AND (NOT LIBSIGMF_FOUND OR LIBSIGMF_EXTERNAL))