masscan: enable selftest and minor cleanups

pkgs/tools/security/masscan/default.nix

@@ -19,23 +19,29 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ makeWrapper installShellFiles ];
 
-  makeFlags = [ "PREFIX=$(out)" "GITVER=${version}" "CC=${stdenv.cc.targetPrefix}cc" ];
+  makeFlags = [
+    "PREFIX=$(out)"
+    "GITVER=${version}"
+    "CC=${stdenv.cc.targetPrefix}cc"
+  ];
 
-  preInstall = ''
-    mkdir -p $out/bin
-  '';
+  enableParallelBuilding = true;
 
   postInstall = ''
-    installManPage doc/masscan.8
+    installManPage doc/masscan.?
 
-    mkdir -p $out/share/{doc,licenses}/masscan
-    mkdir -p $out/etc/masscan
+    install -Dm444 -t $out/etc/masscan            data/exclude.conf
+    install -Dm444 -t $out/share/doc/masscan      doc/*.{html,js,md}
+    install -Dm444 -t $out/share/licenses/masscan LICENSE
 
-    cp data/exclude.conf $out/etc/masscan
-    cp -t $out/share/doc/masscan doc/algorithm.js doc/howto-afl.md doc/bot.html
-    cp LICENSE $out/share/licenses/masscan/LICENSE
+    wrapProgram $out/bin/masscan \
+      --prefix LD_LIBRARY_PATH : "${libpcap}/lib"
+  '';
 
-    wrapProgram $out/bin/masscan --prefix LD_LIBRARY_PATH : "${libpcap}/lib"
+  doInstallCheck = true;
+
+  installCheckPhase = ''
+    $out/bin/masscan --selftest
   '';
 
   meta = with lib; {