fix: fix the nix module

`try` installed with the home manager module failed because it references
/usr/bin/ruby which is absent on nixos. This fix removes the calls to ruby
that broke nixos installations, as well as patching the shebang at the beginning

Author: ipsavitsky

flake.nix

@@ -69,15 +69,16 @@
           version = "0.1.0";
 
           src = inputs.self;
-          nativeBuildInputs = [ pkgs.makeBinaryWrapper ];
+
+          postPatch = ''
+            substituteInPlace try.rb \
+              --replace-fail '#!/usr/bin/env ruby' '#!${ruby}/bin/ruby'
+          '';
 
           installPhase = ''
             mkdir -p $out/bin
             cp try.rb $out/bin/try
             chmod +x $out/bin/try
-
-            wrapProgram $out/bin/try \
-              --prefix PATH : ${ruby}/bin
           '';
 
           meta = with pkgs.lib; {

try.rb

@@ -1118,7 +1118,7 @@ def cmd_init!(args, tries_path)
     bash_or_zsh_script = <<~SHELL
       try() {
         local out
-        out=$(/usr/bin/env ruby '#{script_path}' exec#{path_arg} "$@" 2>/dev/tty)
+        out=$('#{script_path}' exec#{path_arg} "$@" 2>/dev/tty)
         if [ $? -eq 0 ]; then
           eval "$out"
         else
@@ -1129,7 +1129,7 @@ def cmd_init!(args, tries_path)
 
     fish_script = <<~SHELL
       function try
-        set -l out (/usr/bin/env ruby '#{script_path}' exec#{path_arg} $argv 2>/dev/tty | string collect)
+        set -l out ('#{script_path}' exec#{path_arg} $argv 2>/dev/tty | string collect)
         if test $status -eq 0
           eval $out
         else