diff --git a/pkgs/by-name/li/libsquish/package.nix b/pkgs/by-name/li/libsquish/package.nix
new file mode 100644
index 000000000000..e62af249fa52
--- /dev/null
+++ b/pkgs/by-name/li/libsquish/package.nix
@@ -0,0 +1,47 @@
+{
+  cmake,
+  fetchurl,
+  lib,
+  libpng,
+  ninja,
+  stdenv,
+  zlib,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "libsquish";
+  version = "1.15";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/project/libsquish/libsquish-${finalAttrs.version}.tgz";
+    hash = "sha256-YoeW7rpgiGYYOmHQgNRpZ8ndpnI7wKPsUjJMhdIUcmk=";
+  };
+  sourceRoot = ".";
+
+  nativeBuildInputs = [
+    cmake
+    ninja
+  ];
+
+  buildInputs = [
+    libpng
+    zlib
+  ];
+
+  cmakeFlags = [
+    (lib.cmakeBool "BUILD_SHARED_LIBS" true)
+    (lib.cmakeFeature "CMAKE_POLICY_VERSION_MINIMUM" "3.5")
+  ];
+
+  meta = {
+    description = "Library for compressing images with the DXT/S3TC standard";
+    longDescription = ''
+      The libSquish library compresses images with the DXT standard (also known
+      as S3TC). This standard is mainly used by OpenGL and DirectX for the lossy
+      compression of RGBA textures.
+    '';
+    homepage = "https://libsquish.sourceforge.io";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.azahi ];
+    platforms = lib.platforms.all;
+  };
+})
diff --git a/pkgs/by-name/vc/vcmi/package.nix b/pkgs/by-name/vc/vcmi/package.nix
index b7aa3e7dbdd9..666aab9dd202 100644
--- a/pkgs/by-name/vc/vcmi/package.nix
+++ b/pkgs/by-name/vc/vcmi/package.nix
@@ -1,40 +1,40 @@
 {
-  lib,
-  stdenv,
-  fetchFromGitHub,
   SDL2,
   SDL2_image,
   SDL2_mixer,
   SDL2_ttf,
   boost,
   cmake,
+  fetchFromGitHub,
   ffmpeg,
   fuzzylite,
   innoextract,
+  lib,
+  libsquish,
   luajit,
   minizip,
   ninja,
+  onetbb,
+  onnxruntime,
   pkg-config,
   python3,
-  onetbb,
+  qt6,
+  stdenv,
   unshield,
+  versionCheckHook,
   xz,
   zlib,
-  testers,
-  vcmi,
-  libsForQt5,
 }:
-
 stdenv.mkDerivation (finalAttrs: {
   pname = "vcmi";
-  version = "1.6.8";
+  version = "1.7.0";
 
   src = fetchFromGitHub {
     owner = "vcmi";
     repo = "vcmi";
     tag = finalAttrs.version;
     fetchSubmodules = true;
-    hash = "sha256-k6tkylNXEzU+zzYoFWtx+AkoHQzAwbBxPB2DVevsryw=";
+    hash = "sha256-wwPlsXJd34OYfLdCkCl6PdboEo+9/ZPQWgmSxn88W+k=";
   };
 
   nativeBuildInputs = [
@@ -42,7 +42,7 @@ stdenv.mkDerivation (finalAttrs: {
     ninja
     pkg-config
     python3
-    libsForQt5.wrapQtAppsHook
+    qt6.wrapQtAppsHook
   ];
 
   buildInputs = [
@@ -53,27 +53,28 @@ stdenv.mkDerivation (finalAttrs: {
     boost
     ffmpeg
     fuzzylite
+    libsquish
     luajit
     minizip
-    libsForQt5.qtbase
-    libsForQt5.qttools
     onetbb
+    onnxruntime
+    qt6.qtbase
+    qt6.qttools
     xz
     zlib
   ];
 
   cmakeFlags = [
-    "-DENABLE_LUA:BOOL=ON"
-    "-DENABLE_ERM:BOOL=ON"
-    "-DENABLE_GOLDMASTER:BOOL=ON"
-    "-DENABLE_PCH:BOOL=OFF"
-    "-DENABLE_TEST:BOOL=OFF" # Tests require HOMM3 data files.
-    "-DFORCE_BUNDLED_MINIZIP:BOOL=OFF"
-    "-DFORCE_BUNDLED_FL:BOOL=OFF"
-    "-DCMAKE_INSTALL_RPATH:STRING=$out/lib/vcmi"
-    "-DCMAKE_INSTALL_BINDIR:STRING=bin"
-    "-DCMAKE_INSTALL_LIBDIR:STRING=lib"
-    "-DCMAKE_INSTALL_DATAROOTDIR:STRING=share"
+    (lib.cmakeBool "ENABLE_CLIENT" true)
+    (lib.cmakeBool "ENABLE_LUA" true)
+    (lib.cmakeBool "ENABLE_ERM" true)
+    (lib.cmakeBool "ENABLE_GOLDMASTER" true)
+    (lib.cmakeBool "ENABLE_TEST" false) # Requires nonfree data files.
+    (lib.cmakeBool "ENABLE_PCH" false)
+    (lib.cmakeFeature "CMAKE_INSTALL_RPATH" "$out/lib/vcmi")
+    (lib.cmakeFeature "CMAKE_INSTALL_BINDIR" "bin")
+    (lib.cmakeFeature "CMAKE_INSTALL_LIBDIR" "lib")
+    (lib.cmakeFeature "CMAKE_INSTALL_DATAROOTDIR" "share")
   ];
 
   postFixup = ''
@@ -87,23 +88,36 @@ stdenv.mkDerivation (finalAttrs: {
       }"
   '';
 
-  passthru.tests.version = testers.testVersion {
-    package = vcmi;
-    command = ''
-      XDG_DATA_HOME="$TMPDIR" XDG_CACHE_HOME="$TMPDIR" XDG_CONFIG_HOME="$TMPDIR" \
-        vcmiclient --version
-    '';
-  };
+  doInstallCheck = true;
+  nativeInstallCheckInputs = [ versionCheckHook ];
+  versionCheckProgram = "${placeholder "out"}/bin/vcmiclient";
+  versionCheckProgramArg = "--version";
+  versionCheckKeepEnvironment = [
+    "XDG_CACHE_HOME"
+    "XDG_CONFIG_HOME"
+    "XDG_DATA_HOME"
+  ];
+  preVersionCheck = ''
+    export \
+      XDG_CACHE_HOME="$TMPDIR" \
+      XDG_CONFIG_HOME="$TMPDIR" \
+      XDG_DATA_HOME="$TMPDIR"
+  '';
 
   meta = {
     description = "Open-source engine for Heroes of Might and Magic III";
+    longDescription = ''
+      VCMI is an open-source engine for Heroes of Might and Magic III, offering
+      new and extended possibilities. To use VCMI, you need to own the original
+      data files.
+    '';
     homepage = "https://vcmi.eu";
-    changelog = "https://github.com/vcmi/vcmi/blob/${finalAttrs.src.rev}/ChangeLog.md";
+    changelog = "https://vcmi.eu/ChangeLog";
     license = with lib.licenses; [
       gpl2Plus
       cc-by-sa-40
     ];
-    maintainers = with lib.maintainers; [ azahi ];
+    maintainers = [ lib.maintainers.azahi ];
     platforms = lib.platforms.linux;
     mainProgram = "vcmilauncher";
   };