在Docker上安装dlib

Question

我正在尝试在Docker容器上安装dlib，但这给了我以下错误

# pkg-config --cflags  -- dlib-1
Package dlib-1 was not found in the pkg-config search path.
Perhaps you should add the directory containing `dlib-1.pc'
to the PKG_CONFIG_PATH environment variable
No package 'dlib-1' found
pkg-config: exit status 1

以下是iam的安装方式

RUN wget http://dlib.net/files/dlib-19.6.tar.bz2
RUN tar xvf dlib-19.6.tar.bz2
RUN ls
RUN cd dlib-19.6 && \
    mkdir build && \
    cd build && \
    cmake .. && \
    cmake --build . --config Release && \
    make install && \
    ldconfig
RUN cd ..
RUN pkg-config --libs --cflags dlib-1
RUN cd dlib-19.6 && \
    python setup.py install

告诉我我做错了什么。过去两天都在这里