diff --git a/src/nix-find-roots/local.mk b/src/nix-find-roots/local.mk
index c3f0a0919..f7abecff5 100644
--- a/src/nix-find-roots/local.mk
+++ b/src/nix-find-roots/local.mk
@@ -6,6 +6,10 @@ libfindroots_DIR := $(d)/lib
 
 libfindroots_SOURCES := $(wildcard $(d)/lib/*.cc)
 
+ifdef HOST_DARWIN
+libfindroots_LDFLAGS += -lc++fs
+endif
+
 programs += nix-find-roots
 
 nix-find-roots_DIR := $(d)