diff --git a/Makefile b/Makefile
index bb62f7d..8b29356 100644
--- a/Makefile
+++ b/Makefile
@@ -27,6 +27,7 @@ tmp:
 	mkdir -p tmp
 
 dockerfiles:
+	mkdir -p dockerfiles/build
 	cat dockerfiles/src/debian_bookworm > dockerfiles/build/Dockerfile.debian_bookworm
 	cat dockerfiles/src/shared >> dockerfiles/build/Dockerfile.debian_bookworm
 
diff --git a/dockerfiles/src/shared b/dockerfiles/src/shared
index 7c6fcf8..dc7100f 100644
--- a/dockerfiles/src/shared
+++ b/dockerfiles/src/shared
@@ -1,3 +1,4 @@
 RUN mkdir -p /workdir
+RUN wget https://bitbucket.org/ktakashi/sagittarius-scheme/downloads/sagittarius-0.9.11.tar.gz
 WORKDIR /workdir
 ENTRYPOINT ["bash", "test-all.sh"]