diff --git a/horizon.dhall b/horizon.dhall
index d319fbf3502d4561c321242e298c43bce98ff382..70e2cfaacdd59d9863ce871d0f2962042bd1365d 100644
--- a/horizon.dhall
+++ b/horizon.dhall
@@ -549,6 +549,7 @@ let packages =
       , horizon-gen-nix = H.callHackage "horizon-gen-nix" "0.6"
       , horizon-spec = H.callHackage "horizon-spec" "0.6.1"
       , horizon-spec-lens = H.callHackage "horizon-spec-lens" "0.1"
+      , horizon-spec-pretty = H.callHackage "horizon-spec-pretty" "0.0.1"
       , hosc = H.callHackage "hosc" "0.19.1"
       , hostname = H.callHackage "hostname" "1.0"
       , hourglass = H.callHackage "hourglass" "0.2.12"
diff --git a/initial-packages.nix b/initial-packages.nix
index 80a6d305e581523e99ffba19e8175d935af34c34..6a41f1079d1fcbf87dde842b6d78a175f7bb0575 100644
--- a/initial-packages.nix
+++ b/initial-packages.nix
@@ -841,6 +841,8 @@ self: with pkgs.haskell.lib; {
 
   horizon-spec-lens = self.callPackage (./pkgs/horizon-spec-lens.nix) { };
 
+  horizon-spec-pretty = self.callPackage (./pkgs/horizon-spec-pretty.nix) { };
+
   hosc = self.callPackage (./pkgs/hosc.nix) { };
 
   hostname = self.callPackage (./pkgs/hostname.nix) { };
diff --git a/pkgs/horizon-spec-pretty.nix b/pkgs/horizon-spec-pretty.nix
new file mode 100644
index 0000000000000000000000000000000000000000..6393bb4d24b080f9943cb4d6d34202048b6435df
--- /dev/null
+++ b/pkgs/horizon-spec-pretty.nix
@@ -0,0 +1,40 @@
+{ mkDerivation
+, base
+, bytestring
+, containers
+, dhall
+, horizon-spec
+, lens
+, lib
+, path
+, text
+}:
+mkDerivation {
+  pname = "horizon-spec-pretty";
+  version = "0.0.1";
+  sha256 = "8edf0b0aaeab131627ef277c223b6311a7cdf441ed0118355b0092f77a62f633";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [
+    base
+    bytestring
+    containers
+    dhall
+    horizon-spec
+    lens
+    path
+    text
+  ];
+  enableLibraryProfiling = true;
+  enableExecutableProfiling = true;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  homepage = "https://horizon-haskell.net";
+  description = "Horizon Stable Package Set Pretty Printer";
+  license = lib.licenses.mit;
+  broken = false;
+}