diff --git a/flake.nix b/flake.nix
index 921c10a..8bcdea7 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,6 +6,7 @@
   outputs =
     { self, nixpkgs }:
     let
+      fileserver = "http://10.0.174.12";
       system = "x86_64-linux";
       pkgs = nixpkgs.legacyPackages.${system};
     in
@@ -17,18 +18,18 @@
 
         mspaintxp = pkgs.callPackage ./pkgs/mspaintxp {
           inherit mfc42;
-          exe = ./XP_mspaintxp.exe;
+          exe = builtins.fetchurl { url = "https://github.com/Chadtech/MSpaintXP/raw/refs/heads/master/mspaint.exe"; sha256 = "sha256:0lgi2h2a44giqzap4gqbiqzh64js25qhdbk985r55jw0jfj157k8"; };
         };
 
         codesys2 = pkgs.callPackage ./pkgs/codesys2 {
-          src = ./pkgs/codesys2/installed.tar.xz;
+          src = builtins.fetchurl { url = "${fileserver}/codesys2/installed.tar.xz"; sha256 = "sha256:0d5znl8n8lgpwacb0frgr93i0dsrvb8g4hby3nvdgahmjnqxqjlc"; };
         };
 
         vcredist2019 = pkgs.callPackage ./pkgs/vcredist2019 { };
 
         codesys3 = pkgs.callPackage ./pkgs/codesys3 {
           inherit vcredist2019;
-          src = ./pkgs/codesys3/prefix.tar.xz;
+          src = builtins.fetchurl { url = "${fileserver}/codesys3/prefix.tar.xz"; sha256 = "sha256:0x06y0151hmjsafnv469yyihmpy2n0pm7vnin9l64slngn1lh2zr"; };
         };
       };