nongnu: Add egl-x11.

* nongnu/packages/nvidia.scm (egl-x11): New variable.

nongnu/packages/nvidia.scm

@@ -888,6 +888,30 @@ GBM EGL support.")
     (home-page "https://github.com/NVIDIA/egl-gbm")
     (license license-gnu:expat)))
 
+(define-public egl-x11
+  (package
+    (name "egl-x11")
+    (version "1.0.0")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/NVIDIA/egl-x11")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "15zqzx061cpzcs0mxc7nnsv9rabfszfxxmwr5v7flxi4m9j6hshc"))))
+    (build-system meson-build-system)
+    (native-inputs (list pkg-config))
+    (inputs (list eglexternalplatform mesa-for-nvda))
+    (synopsis "X11 and XCB EGL external platform library")
+    (description
+     "This package provides an EGL platform library for the NVIDIA driver to
+support XWayland via xlib (using @code{EGL_KHR_platform_x11}) or xcb (using
+@code{EGL_EXT_platform_xcb}).")
+    (home-page "https://github.com/NVIDIA/egl-x11")
+    (license license-gnu:expat)))
+
 (define-public gpustat
   (package
     (name "gpustat")