1 files changed, 10 insertions, 1 deletions
diff --git a/README.md b/README.md
index 1375770..ccedd23 100644
--- a/README.md
+++ b/README.md
@@ -36,11 +36,20 @@ https://marc-stevens.nl/research/papers/C13-S.pdf
 
 ## Compiling
 
-Run:
+### Using autotools
+
 ```
+autoreconf --install
+./configure
 make
 ```
 
+### Using the old build system
+
+```
+make -f Makefile.old
+```
+
 ## Command-line usage
 
 There are two programs `bin/sha1dcsum` and `bin/sha1dcsum_partialcoll`.