diff --git a/ca-certs.opam b/ca-certs.opam
index b5dbfed..4576344 100644
--- a/ca-certs.opam
+++ b/ca-certs.opam
@@ -48,6 +48,6 @@ build: [
 ]
 tags: ["org:mirage"]
 depexts: [
-  ["ca_root_nss"] {os = "freebsd"}
+  ["ca_root_nss"] {os = "freebsd" | os = "dragonfly"}
 ]
 x-maintenance-intent: [ "(latest)" ]
diff --git a/ca-certs.opam.template b/ca-certs.opam.template
index c3d5eba..e95eba9 100644
--- a/ca-certs.opam.template
+++ b/ca-certs.opam.template
@@ -14,6 +14,6 @@ build: [
 ]
 tags: ["org:mirage"]
 depexts: [
-  ["ca_root_nss"] {os = "freebsd"}
+  ["ca_root_nss"] {os = "freebsd" | os = "dragonfly"}
 ]
 x-maintenance-intent: [ "(latest)" ]
diff --git a/lib/ca_certs.ml b/lib/ca_certs.ml
index 3f8139e..d0b1926 100644
--- a/lib/ca_certs.ml
+++ b/lib/ca_certs.ml
@@ -101,6 +101,7 @@ let system_trust_anchors () =
         let* os = Bos.OS.Cmd.(run_out cmd |> out_string |> success) in
         match os with
         | "FreeBSD" -> detect_one freebsd_location
+        | "DragonFly" -> detect_one freebsd_location
         | "OpenBSD" -> detect_one openbsd_location
         | "Linux" -> detect_list linux_locations
         | "Darwin" ->