diff --git a/Dockerfile.dropshell-build b/Dockerfile.dropshell-build
index fa101c6..36ce469 100644
--- a/Dockerfile.dropshell-build
+++ b/Dockerfile.dropshell-build
@@ -110,8 +110,8 @@ RUN git clone --recurse-submodules https://github.com/drogonframework/drogon.git
       -DOPENSSL_USE_STATIC_LIBS=TRUE \
       -DCARES_INCLUDE_DIR=/usr/local/cares/include \
       -DCARES_LIBRARY=/usr/local/cares/lib/libcares.a \
-      -DJSONCPP_INCLUDE_DIR=/usr/local/jsoncpp/include/jsoncpp \
-      -DJSONCPP_LIBRARY=/usr/local/jsoncpp/lib/libjsoncpp.a \
+      -DJSONCPP_INCLUDE_DIRS=/usr/local/jsoncpp/include/jsoncpp \
+      -DJSONCPP_LIBRARIES=/usr/local/jsoncpp/lib/libjsoncpp.a \
       &&\
     make -j$(nproc) && \
     make install && \