diff --git a/pkgs/development/libraries/haskell/crypto-api/default.nix b/pkgs/development/libraries/haskell/crypto-api/0.6.4.nix
similarity index 100%
rename from pkgs/development/libraries/haskell/crypto-api/default.nix
rename to pkgs/development/libraries/haskell/crypto-api/0.6.4.nix
diff --git a/pkgs/development/libraries/haskell/crypto-api/0.7.nix b/pkgs/development/libraries/haskell/crypto-api/0.7.nix
new file mode 100644
index 00000000000..644edbf1961
--- /dev/null
+++ b/pkgs/development/libraries/haskell/crypto-api/0.7.nix
@@ -0,0 +1,18 @@
+{ cabal, cereal, entropy, largeword, tagged }:
+
+cabal.mkDerivation (self: {
+  pname = "crypto-api";
+  version = "0.7";
+  sha256 = "0831rmkq603ga9py5xxfw77qixdliyh15dxh9ls7rd7ia6sqjvx0";
+  buildDepends = [ cereal entropy largeword tagged ];
+  meta = {
+    homepage = "http://trac.haskell.org/crypto-api/wiki";
+    description = "A generic interface for cryptographic operations";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+    maintainers = [
+      self.stdenv.lib.maintainers.andres
+      self.stdenv.lib.maintainers.simons
+    ];
+  };
+})
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index adb1b585d77..cface11d4e2 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -488,7 +488,9 @@ let result = let callPackage = x : y : modifyPrio (newScope result.final x y);
 
   Crypto = callPackage ../development/libraries/haskell/Crypto {};
 
-  cryptoApi = callPackage ../development/libraries/haskell/crypto-api {};
+  cryptoApi_0_6_4 = callPackage ../development/libraries/haskell/crypto-api/0.6.4.nix {};
+  cryptoApi_0_7 = callPackage ../development/libraries/haskell/crypto-api/0.7.nix {};
+  cryptoApi = self.cryptoApi_0_6_4;
 
   cryptocipher = callPackage ../development/libraries/haskell/cryptocipher {};