diff --git a/Makefile b/Makefile
index 3779d31..b377cae 100644
--- a/Makefile
+++ b/Makefile
@@ -4,8 +4,6 @@ all: build
 
 # Install some Quicklisp dependencies.
 ql-deps:
-	# 2023-03: we want str:ensure-suffix, not yet in Quicklisp.
-	git clone https://github.com/vindarel/cl-str/ ~/quicklisp/local-projects/cl-str
 	# 2023-05: log4cl doesn't compile on SBCL v2.3.4
 	# See issue https://github.com/ciel-lang/CIEL/issues/24
 	# This has been fixed upstream, not yet in Quicklisp