diff --git a/ostap/CMakeLists.txt b/ostap/CMakeLists.txt
index 93efdf8b..53fd844c 100644
--- a/ostap/CMakeLists.txt
+++ b/ostap/CMakeLists.txt
@@ -347,12 +347,15 @@ list(FILTER             allfiles EXCLUDE REGEX ".*\\/__init__\\.py$")
 list(FILTER             allfiles EXCLUDE REGEX ".*\\/tests/.*\\.py$")
 list(FILTER             allfiles EXCLUDE REGEX ".*\\/sp_.*\\.py$")
 list(FILTER             allfiles EXCLUDE REGEX ".*\\/.*#.*\\.py$")
+##
 if ( Python_VERSION VERSION_LESS "3.3")
    list(FILTER             allfiles EXCLUDE REGEX ".*\\/lzshelve\\.py$")
-endif () 
+endif ()
+##
 if ( Python_VERSION VERSION_LESS "3.6")
    list(FILTER             allfiles EXCLUDE REGEX ".*\\/zstshelve\\.py$")
-endif () 
+endif ()
+##
 if ( NOT ${PY_zstandard_FOUND} )
    list(FILTER             allfiles EXCLUDE REGEX ".*\\/zstshelve\\.py$")
 endif()
diff --git a/ostap/__init__.py.in b/ostap/__init__.py.in
index cb2ba214..27bb0dc3 100644
--- a/ostap/__init__.py.in
+++ b/ostap/__init__.py.in
@@ -45,7 +45,7 @@ version_info = VersionInfo ( @OSTAP_VERSION_MAJOR@ ,
                              @OSTAP_VERSION_PATCH@ ,
                              @OSTAP_VERSION_TWEAK@ )
 build_date   = __date__
-build_time   = datetime.datetime.utcfromtimestamp ( @OSTAP_BUILD_UTCUNIX@ )
+build_time   = datetime.datetime.fromtimestamp ( @OSTAP_BUILD_UTCUNIX@ , datetime.UTC )
 version_int  = version_info.tweak                   +\
                version_info.patch             * 100 +\
                version_info.minor       * 100 * 100 +\