diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7d644372..f7d2f074 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,7 +5,7 @@ variables:
 build_project:
   stage: build
   script:
-    - "( brew install libsodium json-c autoconf )"
+    - "( brew install libsodium json-c autoconf automake )"
     - "( ./lib/bin/build_libsodium-macos )"
     - "( cd ./platform-independent/c/cli && ./clean && targets=all ./build && ./mpw-tests && ./mpw-cli-tests )"
     - "( cd ./gradle && ./gradlew --info clean test )"
diff --git a/lib/bin/build_lib b/lib/bin/build_lib
index 8003fe2a..4b1c7b94 100755
--- a/lib/bin/build_lib
+++ b/lib/bin/build_lib
@@ -50,10 +50,10 @@ _initialize() {
 #
 # Check if all tools needed for the default implementations are available.
 #
-# By default, this will check for `autoreconf`.
+# By default, this will check for `automake` (for aclocal) and `autoconf` (for autoreconf).
 initialize_needs() { _initialize_needs "$@"; }
 _initialize_needs() {
-    needs autoreconf
+    needs automake autoconf
 }
 
 # clean <prefix> <platform>