diff --git a/package/libkcapi/libkcapi.mk b/package/libkcapi/libkcapi.mk
index d21c81b168..1e27371702 100644
--- a/package/libkcapi/libkcapi.mk
+++ b/package/libkcapi/libkcapi.mk
@@ -11,6 +11,10 @@ LIBKCAPI_AUTORECONF = YES
 LIBKCAPI_INSTALL_STAGING = YES
 LIBKCAPI_LICENSE = BSD-3-Clause (library), BSD-3-Clause or GPL-2.0 (programs)
 LIBKCAPI_LICENSE_FILES = COPYING COPYING.gplv2 COPYING.bsd
+LIBKCAPI_CONF_ENV = \
+	ac_cv_path_DB2PDF="" \
+	ac_cv_path_DB2PS="" \
+	ac_cv_path_XMLTO=""
 
 ifeq ($(BR2_PACKAGE_LIBKCAPI_APPS),y)
 LIBKCAPI_CONF_OPTS += \