diff --git a/pkgs/tools/networking/acme-client/default.nix b/pkgs/tools/networking/acme-client/default.nix
new file mode 100644
index 00000000000..1e10529082f
--- /dev/null
+++ b/pkgs/tools/networking/acme-client/default.nix
@@ -0,0 +1,38 @@
+{ stdenv
+, apple_sdk ? null
+, cacert
+, defaultCaFile ? "${cacert}/etc/ssl/certs/ca-bundle.crt"
+, fetchurl
+, libbsd
+, libressl
+, pkgconfig
+}:
+
+with stdenv.lib;
+
+stdenv.mkDerivation rec {
+  name = "acme-client-${version}";
+  version = "0.1.16";
+
+  src = fetchurl {
+    url = "https://kristaps.bsd.lv/acme-client/snapshots/acme-client-portable-${version}.tgz";
+    sha256 = "00q05b3b1dfnfp7sr1nbd212n0mqrycl3cr9lbs51m7ncaihbrz9";
+  };
+
+  buildInputs = [ libbsd libressl pkgconfig ]
+    ++ optional stdenv.isDarwin apple_sdk.sdk;
+
+  CFLAGS = "-DDEFAULT_CA_FILE='\"${defaultCaFile}\"'";
+
+  preConfigure = ''
+    export PREFIX="$out"
+  '';
+
+  meta = {
+    homepage = https://kristaps.bsd.lv/acme-client/;
+    description = "Secure ACME/Let's Encrypt client";
+    platforms = platforms.unix;
+    license = licenses.isc;
+    maintainers = with maintainers; [ pmahoney ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 958f2e0bcb0..0d2abec1103 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -431,6 +431,8 @@ with pkgs;
 
   aescrypt = callPackage ../tools/misc/aescrypt { };
 
+  acme-client = callPackage ../tools/networking/acme-client { inherit (darwin) apple_sdk; };
+
   afew = callPackage ../applications/networking/mailreaders/afew { pythonPackages = python3Packages; };
 
   afio = callPackage ../tools/archivers/afio { };