diff --git a/common/install_libpng.sh b/common/install_libpng.sh
index b92829020..475f574de 100644
--- a/common/install_libpng.sh
+++ b/common/install_libpng.sh
@@ -10,9 +10,13 @@ pushd libpng
 wget http://download.sourceforge.net/libpng/libpng-$LIBPNG_VERSION.tar.gz
 tar -xvzf libpng-$LIBPNG_VERSION.tar.gz
 
+pushd libpng-$LIBPNG_VERSION
+
 ./configure
 make
 make install
 
+popd
+
 popd
 rm -rf libpng
diff --git a/manywheel/Dockerfile b/manywheel/Dockerfile
index 6749a0248..3a150eccf 100644
--- a/manywheel/Dockerfile
+++ b/manywheel/Dockerfile
@@ -8,7 +8,7 @@ ENV LC_ALL en_US.UTF-8
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US.UTF-8
 
-RUN yum install -y wget curl perl util-linux xz bzip2 git patch which perl
+RUN yum install -y wget curl perl util-linux xz bzip2 git patch which perl zlib-devel
 RUN yum install -y yum-utils centos-release-scl
 RUN yum-config-manager --enable rhel-server-rhscl-7-rpms
 RUN yum install -y devtoolset-7-gcc devtoolset-7-gcc-c++ devtoolset-7-gcc-gfortran devtoolset-7-binutils