diff --git a/nixos/modules/programs/flashprog.nix b/nixos/modules/programs/flashprog.nix
index d7529575a3d3..89671fba08f3 100644
--- a/nixos/modules/programs/flashprog.nix
+++ b/nixos/modules/programs/flashprog.nix
@@ -20,6 +20,8 @@ in
   config = lib.mkIf cfg.enable {
     services.udev.packages = [ cfg.package ];
     environment.systemPackages = [ cfg.package ];
+    hardware.libjaylink.enable = true;
+    hardware.libftdi.enable = true;
   };
 
   meta.maintainers = with lib.maintainers; [ felixsinger ];
diff --git a/pkgs/by-name/fl/flashprog/package.nix b/pkgs/by-name/fl/flashprog/package.nix
index 2a7bedf69ba0..446061807a86 100644
--- a/pkgs/by-name/fl/flashprog/package.nix
+++ b/pkgs/by-name/fl/flashprog/package.nix
@@ -46,9 +46,16 @@ stdenv.mkDerivation (finalAttrs: {
       libgpiod
     ];
 
+  postPatch = ''
+    # Remove these rules from flashprog to avoid conflicts with libftdi
+    sed -i"" '/ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001"/d' "util/50-flashprog.rules"
+    sed -i"" '/ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6010"/d' "util/50-flashprog.rules"
+    sed -i"" '/ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6011"/d' "util/50-flashprog.rules"
+    sed -i"" '/ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6014"/d' "util/50-flashprog.rules"
+  '';
+
   postInstall = ''
-    cd "$src"
-    install -Dm644 util/50-flashprog.rules "$out/lib/udev/rules.d/50-flashprog.rules"
+    install -Dm644 ../util/50-flashprog.rules "$out/lib/udev/rules.d/50-flashprog.rules"
   '';
 
   passthru.updateScript = gitUpdater {