diff --git a/internal/rosa/package/stage0.az b/internal/rosa/package/stage0.az
index 76a1895e..e415bbbe 100644
--- a/internal/rosa/package/stage0.az
+++ b/internal/rosa/package/stage0.az
@@ -13,32 +13,30 @@ package rosa-stage0 {
 	exec = generic {
 		build = `
 umask 377
-tar \
-	-vjc \
-	-C /stage0 \
-	-f /work/stage0-`+triple+`.tar.bz2 \
-	.
+tar -vc -C /stage0 . | \
+	zstd -19 -T`+jobsE+` > \
+	/work/stage0-`+triple+`.tar.zst
 `;
 	};
 
-	inputs = [ bzip2 ];
+	inputs = [ zstd ];
 }
 
 package stage0-dist {
 	description = "Rosa OS stage0 bootstrap seed (binary distribution)";
 	exclude = true;
 
-	version# = "20260504";
+	version# = "20260723";
 	output = remoteTar {
 		url = "https://hakurei.app/seed/"+version+"/"+
-			"stage0-"+triple+".tar.bz2";
+			"stage0-"+triple+".tar.zst";
 		checksum = arch {
-			amd64 = "IQjFDkiAVLo1XzflgMMiLP3gnVY2hhDMTzl-QqJDCQhcLQ3lLtRzjI5WCxGyW_lk";
-			arm64 = "6fmwl2Umx2QssKQvxxb1JOGkAjzfA_MXKku0jVdGjYGb35OvwEVA5NYtd0HIy3yH";
-			riscv64 = "Z2ODV0rIoo9iQRUIu35bsaOBeXc_9qQfGcyb2aGneatzNUJlXh5emSpEV2bOklUL";
+			amd64 = "wG8FZoBqpiLNQlT4n7G4uuwFILZPxs_Sf_TQwjvxbS3qNJq8EntGLfMO4sikb1GE";
+			arm64 = "iew97r0y9BgKyeDd5ih2Z-YkR6lh-RjqwYvcVo4XMLBiKHgaZPBMLSmxxVq5YQuv";
+			riscv64 = "NrmC5PtDnr3tY2aVNReorqmYUj29F7PKXsDfWBxvUJfawKzQiDSCURu5HsVmEzsS";
 
 			default = 0;
 		};
-		compress = bzip2;
+		compress = zstd;
 	};
 }