part of my docker file where I build pdfium

gistfile1.txt

# install PDFium
WORKDIR /
RUN apt-get install -y libgtk2.0-dev

RUN git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
ENV PATH /depot_tools:"$PATH"

RUN gclient config --unmanaged https://pdfium.googlesource.com/pdfium.git; \
	gclient sync

WORKDIR pdfium
RUN gn gen out/codebuild --args='use_sysroot=false is_clang=false use_custom_libcxx=false pdf_is_complete_lib=true pdf_is_standalone=true pdf_enable_v8=false pdf_enable_xfa=false pdf_bundle_freetype=true'
RUN ninja -C out/codebuild pdfium