diff --git a/pkgm.ts b/pkgm.ts
index ef0d77a..f128669 100755
--- a/pkgm.ts
+++ b/pkgm.ts
@@ -347,6 +347,7 @@ async function query_pkgx(
 }
 
 async function mirror_directory(dst: string, src: string, prefix: string) {
+  let warned_copy_fallback = false;
   await processEntry(join(src, prefix), join(dst, prefix));
 
   async function processEntry(sourcePath: string, targetPath: string) {
@@ -367,8 +368,18 @@ async function mirror_directory(dst: string, src: string, prefix: string) {
       if (existsSync(targetPath)) {
         await Deno.remove(targetPath);
       }
-      // Create a hard link for files
-      await Deno.link(sourcePath, targetPath);
+      try {
+        await Deno.link(sourcePath, targetPath);
+      } catch {
+        if (!warned_copy_fallback) {
+          console.warn(
+            "%c! hardlinking failed (possibly cross-device?), falling back to file copy",
+            "color:yellow",
+          );
+          warned_copy_fallback = true;
+        }
+        await Deno.copyFile(sourcePath, targetPath);
+      }
     } else if (fileInfo.isSymlink) {
       // Recreate symlink in the target directory
       const linkTarget = await Deno.readLink(sourcePath);