diff --git a/pkgs/development/libraries/crypto++/default.nix b/pkgs/development/libraries/crypto++/default.nix
index 2afc77f9777..a2cfcc45a4c 100644
--- a/pkgs/development/libraries/crypto++/default.nix
+++ b/pkgs/development/libraries/crypto++/default.nix
@@ -1,4 +1,4 @@
-{ fetchurl, stdenv, unzip }:
+{ fetchurl, stdenv, unzip, libtool }:
 
 stdenv.mkDerivation rec {
   name = "crypto++-5.6.0";
@@ -12,7 +12,10 @@ stdenv.mkDerivation rec {
     ++ stdenv.lib.optional (builtins.currentSystem != "i686-cygwin") ./dll.patch;
 
 
-  buildInputs = [ unzip ];
+  buildInputs = [ unzip ]
+
+    # For some reason the makefile sets "AR = libtool" on Darwin.
+    ++ stdenv.lib.optional (builtins.currentSystem == "i686-darwin") libtool;
 
   # Unpack the thing in a subdirectory.
   unpackPhase = ''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 611cdc5de12..549aed5fa92 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2982,7 +2982,7 @@ let
   };
 
   cryptopp = import ../development/libraries/crypto++ {
-    inherit fetchurl stdenv unzip;
+    inherit fetchurl stdenv unzip libtool;
   };
 
   cyrus_sasl = import ../development/libraries/cyrus-sasl {