fix(flake) pin libwebsockets to fix broken ttyd/vhs

CHANGELOG.md

@@ -12,6 +12,7 @@
 
 ### Fix
 
+- (flake) pin `libwebsockets` to fix broken `ttyd`/`vhs` [#212](https://github.com/sectore/timr-tui/pull/212)
 - (notification) show `Pomodoro` or `Tabata` instead of `Countdown` [#209](https://github.com/sectore/timr-tui/pull/209)
 
 ### Misc

demo/pomodoro-auto-special.tape

@@ -1,5 +1,3 @@
-# Note: PR "support ctrl + arrow keys" https://github.com/charmbracelet/vhs/pull/673 needs to be merged to run this `tape`.
-
 Output demo/pomodoro_auto_special.gif
 
 # https://github.com/charmbracelet/vhs/blob/main/THEMES.md

demo/pomodoro.tape

@@ -1,5 +1,3 @@
-# Note: PR "support ctrl + arrow keys" https://github.com/charmbracelet/vhs/pull/673 needs to be merged to run this `tape`.
-
 Output demo/pomodoro.gif
 
 # https://github.com/charmbracelet/vhs/blob/main/THEMES.md

demo/tabata.tape

@@ -1,5 +1,3 @@
-# Note: PR "support ctrl + arrow keys" https://github.com/charmbracelet/vhs/pull/673 needs to be merged to run this `tape`.
-
 Output demo/tabata.gif
 
 # https://github.com/charmbracelet/vhs/blob/main/THEMES.md

flake.nix

@@ -1,6 +1,10 @@
 {
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    # pinned to last known good before `libwebsockets` 4.4.5 broke ttyd/vhs (2026-06-10)
+    # see https://github.com/NixOS/nixpkgs/issues/532638#issuecomment-4734542554
+    # TODO: Remove when `libwebsockets` is fixed upstream
+    nixpkgs-lws.url = "github:NixOS/nixpkgs/7f1c78be632c";
     flake-utils.url = "github:numtide/flake-utils";
     crane.url = "github:ipetkov/crane";
     fenix = {
@@ -11,13 +15,16 @@
 
   outputs = {
     nixpkgs,
+    nixpkgs-lws,
     flake-utils,
     fenix,
     crane,
     ...
   }:
     flake-utils.lib.eachDefaultSystem (system: let
-      pkgs = nixpkgs.legacyPackages.${system};
+      pkgs = nixpkgs.legacyPackages.${system}.extend (_final: _prev: {
+        libwebsockets = nixpkgs-lws.legacyPackages.${system}.libwebsockets;
+      });
 
       toolchain = fenix.packages.${system}.fromToolchainFile {
         file = ./rust-toolchain.toml;
@@ -46,39 +53,6 @@
           CARGO_BUILD_RUSTFLAGS = "-C target-feature=+crt-static";
         });
 
-      vhs = pkgs.buildGoModule (finalAttrs: {
-        pname = "vhs";
-        version = "0.11.0";
-
-        src = pkgs.fetchFromGitHub {
-          owner = "charmbracelet";
-          repo = "vhs";
-          tag = "v${finalAttrs.version}";
-          # hash = nixpkgs.lib.fakeSha256;
-          hash = "sha256-VOiI+ddiax04QtCcDr6ze53kd/HHGbfQE3j/32iq4Ro=";
-        };
-
-        # vendorHash = nixpkgs.lib.fakeSha256;
-        vendorHash = "sha256-cgKLYUATtn4hMdIOXZe9JWYNUOrX3S6BDfvS+rIWDfM=";
-
-        nativeBuildInputs = [pkgs.makeBinaryWrapper];
-
-        ldflags = [
-          "-s"
-          "-w"
-          "-X=main.Version=${finalAttrs.version}"
-        ];
-
-        postInstall = ''
-          wrapProgram $out/bin/vhs --prefix PATH : ${
-            pkgs.lib.makeBinPath (
-              [pkgs.ffmpeg pkgs.ttyd]
-              ++ pkgs.lib.optionals pkgs.stdenv.hostPlatform.isLinux [pkgs.chromium]
-            )
-          }
-        '';
-      });
-
       # Windows cross-compilation build
       # @see https://crane.dev/examples/cross-windows.html
       windowsBuild = let
@@ -107,7 +81,7 @@
           packages =
             [
               toolchain
-              vhs
+              pkgs.vhs
               pkgs.just
               pkgs.nixd
               pkgs.alejandra