diff --git a/ostap/CMakeLists.txt b/ostap/CMakeLists.txt
index 12ca8a13..1603af42 100644
--- a/ostap/CMakeLists.txt
+++ b/ostap/CMakeLists.txt
@@ -185,7 +185,7 @@ if  ( ${PYTHON_VERSION} VERSION_GREATER_EQUAL "3.6" )
 if  ( ${PYTHON_VERSION} VERSION_LESS          "3.7" )
    find_python_module ( berkeleydb QUIET )
    if ( NOT ${PY_berkeleydb_FOUND} )
-     execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install -Iv "berkeleydb==18.1.4" ${PIP_ARGS})
+     execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install "berkeleydb==18.1.4" ${PIP_ARGS})
    endif()
 endif()
 endif() 
@@ -194,7 +194,7 @@ if  ( ${PYTHON_VERSION} VERSION_GREATER_EQUAL "3.7" )
 if  ( ${PYTHON_VERSION} VERSION_LESS          "3.8" )
    find_python_module ( berkeleydb QUIET )
    if ( NOT ${PY_berkeleydb_FOUND} )
-     execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install -Iv "berkeleydb==18.1.6" ${PIP_ARGS})
+     execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install "berkeleydb==18.1.6" ${PIP_ARGS})
    endif()
 endif()
 endif()