diff --git a/library_builders.sh b/library_builders.sh
index 65697db955..000542a0e1 100644
--- a/library_builders.sh
+++ b/library_builders.sh
@@ -119,8 +119,6 @@ function build_adios2 {
         -DEVPATH_USE_ZPL_ENET=${EVPATH_ZPL}       \
         -DHDF5_USE_STATIC_LIBRARIES:BOOL=ON       \
         -DCMAKE_VERBOSE_MAKEFILE=ON               \
-        -DCMAKE_DISABLE_FIND_PACKAGE_LibFFI=TRUE  \
-        -DCMAKE_DISABLE_FIND_PACKAGE_BISON=TRUE   \
         -DADIOS2_INSTALL_GENERATE_CONFIG=OFF      \
         -DCMAKE_INSTALL_PREFIX=${BUILD_PREFIX} ../ADIOS2-*