diff --git a/.github/workflows/build_linux_aarch64.yml b/.github/workflows/build_linux_aarch64.yml
index 29bafd2..d68e3b3 100644
--- a/.github/workflows/build_linux_aarch64.yml
+++ b/.github/workflows/build_linux_aarch64.yml
@@ -28,7 +28,7 @@ jobs:
           --volume "${PWD}:/muscle"
         install: |
           apt-get update -q -y
-          apt-get install -q -y make g++ file git python3
+          apt-get install -q -y make g++ file git python3 curl
         run: |
           git config --global --add safe.directory /muscle
           cd /muscle/src
diff --git a/README.md b/README.md
index add0066..32c8ea6 100644
--- a/README.md
+++ b/README.md
@@ -11,9 +11,15 @@ Muscle supports generating an ensemble of alternative alignments with the same h
 Structure alignment ("Muscle-3D") is supported as well as conventional amino acid sequence alignment. Input for structure alignment is a "mega" file generated by the `pdb2mega` command of `reseek` (https://github.com/rcedgar/reseek).
 
 <pre>
+# for up to ~100 structures
 reseek -pdb2mega STRUCTS -output structs.mega
-muscle -align structs.mega -output structs.afa # for up to ~100 structures
-muscle -super7 structs.mega -output structs.afa # for up to ~10,000 structures
+muscle -align structs.mega -output structs.afa
+
+# for up to ~10,000 structures
+reseek -convert STRUCTS -bca structs.bca
+reseek -pdb2mega structs.bca -output structs.mega
+reseek -distmx structs.bca -output structs.distmx
+muscle -super7 structs.mega -distmxin structs.distmx -reseek -output structs.afa
 </pre>
 
 ### Downloads and installation