nix-proot:$nix-env -i openssl
replacing old ‘openssl-1.1.0f’
installing ‘openssl-1.1.0f’
building path(s) ‘/nix/store/5fb5lsrvzbah437f5ik2dxzll8rxmlh2-user-environment’
created 534 symlinks in user environment


nix-proot:$./configure
checking for a sed that does not truncate output... /bin/sed
checking build system type... x86_64-unknown-linux-gnu
checking host system type... x86_64-unknown-linux-gnu
checking for the canonical Nix system name... x86_64-linux
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for dirent.h that defines DIR... yes
checking for library containing opendir... none required
checking for struct dirent.d_type... yes
checking for gcc... (cached) gcc
checking whether we are using the GNU C compiler... (cached) yes
checking whether gcc accepts -g... (cached) yes
checking for gcc option to accept ISO C89... (cached) none needed
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for pubsetbuf... yes
checking for statvfs... yes
checking for lutimes... yes
checking whether it is possible to create a link to a symlink... yes
checking how to run the C++ preprocessor... g++ -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking locale usability... yes
checking locale presence... yes
checking for locale... yes
checking how to run the C preprocessor... gcc -E
checking err.h usability... yes
checking err.h presence... yes
checking for err.h... yes
checking for curl... /usr/bin/curl
checking for bash... /bin/bash
checking for patch... /usr/bin/patch
checking for xmllint... /usr/bin/xmllint
checking for xsltproc... false
checking for flex... false
checking for bison... false
checking for perl... /usr/bin/perl
checking for sed... /bin/sed
checking for tar... /bin/tar
checking for bzip2... /bin/bzip2
checking for gzip... /bin/gzip
checking for xz... /usr/bin/xz
checking for dot... /usr/bin/dot
checking for dblatex... no
checking for pv... pv
checking whether Perl is recent enough... yes
checking for the Perl installation prefix... ${exec_prefix}/lib/perl5/site_perl/5.26.0/x86_64-linux-gnu-thread-multi
checking for cat... /bin/cat
checking for tr... /usr/bin/tr
checking for openssl... /home/leo/.nix-profile/bin/openssl
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for libcrypto... no
configure: error: Package requirements (libcrypto) were not met:

No package 'libcrypto' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables OPENSSL_CFLAGS
and OPENSSL_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.