zoneminder: fix the build

pkgs/servers/zoneminder/default.nix

@@ -174,6 +174,7 @@ in stdenv.mkDerivation rec {
       perlFlags="$perlFlags -I$i"
     done
 
+    mkdir -p $out/libexec
     for f in $out/bin/*.pl ; do
       mv $f $out/libexec/
       makeWrapper ${perlBin} $f \
@@ -186,7 +187,7 @@ in stdenv.mkDerivation rec {
 
   meta = with stdenv.lib; {
     description = "Video surveillance software system";
-    homepage = https://zoneminder.com;
+    homepage = "https://zoneminder.com";
     license = licenses.gpl3;
     maintainers = with maintainers; [ peterhoeg ];
     platforms = platforms.unix;