d2: disable playwright/libgbm on platforms where libdrm is unsupported (#514885)

pkgs/by-name/d2/d2/package.nix

@@ -6,6 +6,7 @@
   git,
   testers,
   d2,
+  libdrm,
   libgbm,
   makeWrapper,
   playwright-driver,
@@ -37,7 +38,7 @@ buildGoModule (finalAttrs: {
     makeWrapper
   ];
 
-  buildInputs = [
+  buildInputs = lib.optionals libdrm.meta.available [
     libgbm
     playwright-driver.browsers
   ];
@@ -46,10 +47,11 @@ buildGoModule (finalAttrs: {
 
   postInstall = ''
     installManPage ci/release/template/man/d2.1
-
-      # Wrap the d2 executable to set LD_LIBRARY_PATH for Playwright
-      wrapProgram $out/bin/d2 \
-        --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath finalAttrs.buildInputs}
+  ''
+  # Wrap the d2 executable to set LD_LIBRARY_PATH for Playwright
+  + lib.optionalString (finalAttrs.buildInputs != [ ]) ''
+    wrapProgram $out/bin/d2 \
+      --prefix LD_LIBRARY_PATH : ${lib.makeLibraryPath finalAttrs.buildInputs}
   '';
 
   preCheck = ''