diff --git a/tools/Dockerfile b/tools/Dockerfile
index 23153c5..37df3f0 100644
--- a/tools/Dockerfile
+++ b/tools/Dockerfile
@@ -1,73 +1,74 @@
 # trusty
 FROM ubuntu:14.04 as heaptrack_appimage_intermediate
 
 # install dependencies
 ARG DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update && \
     apt-get -y upgrade && \
     apt-get install -y software-properties-common build-essential curl git wget \
         autotools-dev autoconf libtool liblzma-dev libz-dev gettext && \
     add-apt-repository ppa:beineri/opt-qt-5.10.1-trusty -y && \
     apt-get update && \
     apt-get install -y qt510base qt510svg qt510x11extras cmake3 libdwarf-dev mesa-common-dev \
         libboost-iostreams-dev libboost-program-options-dev libboost-system-dev libboost-filesystem-dev
 
 WORKDIR /opt
 
 # download prebuild KF5 libraries and ECM
 
 RUN wget -c "https://github.com/chigraph/precompiled-kf5-linux/releases/download/precompiled/kf5-gcc6-linux64-release.tar.xz" && \
     tar --strip-components=2 -xf kf5-gcc6-linux64-release.tar.xz
 
 # download AppImage tools and extract them, to remove fuse dependency
 
 RUN wget -c "https://github.com/probonopd/linuxdeployqt/releases/download/continuous/linuxdeployqt-continuous-x86_64.AppImage" -O /tmp/linuxdeployqt && \
     wget -c "https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-x86_64.AppImage" -O /tmp/appimagetool && \
     chmod a+x /tmp/linuxdeployqt /tmp/appimagetool && \
     /tmp/linuxdeployqt --appimage-extract && mv squashfs-root linuxdeployqt && \
     ln -s /opt/linuxdeployqt/AppRun /opt/bin/linuxdeployqt && \
     /tmp/appimagetool --appimage-extract && mv squashfs-root appimagetool && \
     ln -s /opt/appimagetool/AppRun /opt/bin/appimagetool
 
 # setup env
 
 ENV PATH="/opt/bin:/opt/qt510/bin:${PATH}" \
     PKG_CONFIG_PATH="/opt/qt510/lib/pkgconfig:${PKG_CONFIG_PATH}" \
     LD_LIBRARY_PATH="/opt/qt510/lib:/opt/lib/x86_64-linux-gnu"
 
 # grab sources
 
 RUN git clone git://git.sv.gnu.org/libunwind.git && \
     git clone https://github.com/facebook/zstd.git && \
     git clone git://anongit.kde.org/kdiagram
 
 # build libunwind
 
 WORKDIR /opt/libunwind
 
+COPY tools/elf.h /usr/include/
 RUN autoreconf -vfi && \
     ./configure --prefix /usr/local --enable-debug-frame --enable-minidebuginfo && \
     make -j$(nproc) && make install
 
 # build zstd
 
 WORKDIR /opt/zstd
 
 RUN make -j$(nproc) && make install
 
 # build kdiagram
 
 WORKDIR /opt/kdiagram
 
 RUN cmake -DBUILD_TESTING=OFF -DCMAKE_INSTALL_PREFIX=/opt -DCMAKE_BUILD_TYPE=Release && \
     make -j$(nproc) && make install
 
 # setup heaptrack build environment
 
 FROM heaptrack_appimage_intermediate
 
 ADD . /opt/heaptrack
 WORKDIR /opt/heaptrack
 
 CMD ./tools/build_appimage.sh /opt /artifacts
diff --git a/tools/build_appimage_in_docker.sh b/tools/build_appimage_in_docker.sh
index d804429..41a48c0 100755
--- a/tools/build_appimage_in_docker.sh
+++ b/tools/build_appimage_in_docker.sh
@@ -1,12 +1,13 @@
 #!/bin/sh
 
 cd $(dirname $0)/../
 
 if [ ! -d /tmp/heaptrack-appimage-artifacts ]; then
     mkdir /tmp/heaptrack-appimage-artifacts
 fi
 
+cp /usr/include/elf.h tools/
 sudo docker build -t heaptrack_appimage -f tools/Dockerfile . || exit 1
 sudo docker run -v /tmp/heaptrack-appimage-artifacts:/artifacts -it heaptrack_appimage
 mv /tmp/heaptrack-appimage-artifacts/heaptrack-x86_64.AppImage heaptrack-$(git describe)-x86_64.AppImage
 ls -latr heaptrack-*.AppImage | tail -n 1