Update Dockerfile

icestorm/Dockerfile

@@ -4,7 +4,7 @@ MAINTAINER Sven Braun <s.braun@mobileonly.com>
 #EXPOSE 80 3306
 RUN export DEBIAN_FRONTEND="noninteractive" && apt-get update  && apt-get -y install  build-essential autoconf sudo automake autotools-dev clang bison flex libreadline-dev libtool wget \
 patchutils bc libexpat1-dev zlib1g-dev gawk tcl-dev libffi-dev git libmpc-dev libmpfr-dev libgmp-dev gawk texinfo gperf libtool mercurial \
-graphviz xdot pkg-config python3 libftdi-dev php-cli curl gcc-arm-none-eabi telnet xxd cmake clang-format libpython3-dev qt5-default libboost-all-dev && \
+graphviz xdot pkg-config python3 libeigen3-dev libftdi-dev php-cli curl gcc-arm-none-eabi telnet xxd cmake clang-format libpython3-dev qt5-default libboost-all-dev && \
 cd /root && git clone https://github.com/cliffordwolf/icestorm.git icestorm && cd icestorm && make -j$(nproc) && make install && \
 cd /root && git clone https://github.com/cseed/arachne-pnr.git arachne-pnr && cd arachne-pnr && make -j$(nproc) && make install  && \
 cd /root && git clone https://github.com/cliffordwolf/yosys.git yosys && cd yosys && make -j$(nproc) && make install && \