diff --git a/pkgs/by-name/pi/pixinsight/default.nix b/pkgs/by-name/pi/pixinsight/default.nix
index 06cb980f0fdc..c4a133d7e783 100644
--- a/pkgs/by-name/pi/pixinsight/default.nix
+++ b/pkgs/by-name/pi/pixinsight/default.nix
@@ -10,12 +10,12 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "pixinsight";
-  version = "1.9.3-20250402";
+  version = "1.9.4-20260522";
 
   src = requireFile {
     name = "PI-linux-x64-${finalAttrs.version}-c.tar.xz";
     url = "http://pixinsight.com";
-    hash = "sha256-MOAWH64A13vVLeNiBC9nO78P0ELmXXHR5ilh5uUhWhs=";
+    hash = "sha256-+mMVAleBO5zVAOLfbvi2xedF5aTxzZoZl3UY6HzWW7I=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/by-name/pi/pixinsight/package.nix b/pkgs/by-name/pi/pixinsight/package.nix
index a228e528d164..0cbed4a99ba5 100644
--- a/pkgs/by-name/pi/pixinsight/package.nix
+++ b/pkgs/by-name/pi/pixinsight/package.nix
@@ -62,6 +62,7 @@ buildFHSEnv {
 
       libGL
       libdrm
+      vulkan-loader
       qt6Packages.qtbase
       gtk3
       fontconfig
@@ -71,6 +72,7 @@ buildFHSEnv {
       libssh2
       libpsl
       libidn2
+      libnghttp2
 
       brotli
       libdeflate