diff --git a/default.nix b/default.nix
index efcbd9a..58e6d51 100644
--- a/default.nix
+++ b/default.nix
@@ -83,6 +83,10 @@ drv = haskellPackages.developPackage {
     configureFlags =
          pkgs.stdenv.lib.optional  doTracing   "--flags=tracing"
       ++ pkgs.stdenv.lib.optional  doStrict    "--ghc-options=-Werror";
+
+    passthru = {
+      nixpkgs = pkgs;
+    };
   });
 
   inherit returnShellEnv;
diff --git a/hydra.json b/hydra.json
new file mode 100644
index 0000000..d2acefd
--- /dev/null
+++ b/hydra.json
@@ -0,0 +1,29 @@
+{
+  "enabled": 1,
+  "hidden": true,
+  "description": "Jobsets",
+  "nixexprinput": "src",
+  "nixexprpath": "jobsets.nix",
+  "checkinterval": 300,
+  "schedulingshares": 100,
+  "enableemail": false,
+  "emailoverride": "",
+  "keepnr": 10,
+  "inputs": {
+    "src": {
+      "type": "git",
+      "value": "https://github.com/haskell-nix/hnix.git master 1",
+      "emailresponsible": false
+    },
+    "nixpkgs": {
+      "type": "git",
+      "value": "https://github.com/NixOS/nixpkgs-channels nixos-unstable",
+      "emailresponsible": false
+    },
+    "prs": {
+      "type": "githubpulls",
+      "value": "haskell-nix hnix",
+      "emailresponsible": false
+    }
+  }
+}
diff --git a/jobsets.nix b/jobsets.nix
new file mode 100644
index 0000000..ff35e63
--- /dev/null
+++ b/jobsets.nix
@@ -0,0 +1,66 @@
+{ prs }:
+
+let
+  self = import ./. {};
+  pkgs = self.nixpkgs;
+  mkFetchGithub = value: {
+    inherit value;
+    type = "git";
+    emailresponsible = false;
+  };
+in
+with pkgs.lib;
+let
+  defaults = jobs: {
+    inherit (jobs) description;
+    enabled = 1;
+    hidden = false;
+    keepnr = 10;
+    schedulingshares = 100;
+    checkinterval = 120;
+    enableemail = false;
+    emailoverride = "";
+    nixexprinput = "hnix";
+    nixexprpath = "release.nix";
+    inputs = jobs.inputs // {
+      nixpkgs = {
+        type = "git";
+        value = "https://github.com/NixOS/nixpkgs-channels nixos-unstable";
+        emailresponsible = false;
+      };
+    };
+  };
+  branchJobset = branch: defaults {
+    description = "hnix-${branch}";
+    inputs = {
+      hnix = {
+        value = "https://github.com/haskell-nix/hnix ${branch}";
+        type = "git";
+        emailresponsible = false;
+      };
+    };
+  };
+  makePr = num: info: {
+    name = "hnix-pr-${num}";
+    value = defaults {
+      description = "#${num}: ${info.title}";
+      inputs = {
+        hnix = {
+          #NOTE: This should really use "pull/${num}/merge"; however, GitHub's
+          #status checks only operate on PR heads.  This creates a race
+          #condition, which can currently only be solved by requiring PRs to be
+          #up to date before they're merged.  See
+          #https://github.com/isaacs/github/issues/1002
+          value = "https://github.com/haskell-nix/hnix pull/${num}/head 1";
+          type = "git";
+          emailresponsible = false;
+        };
+      };
+    };
+  };
+  processedPrs = mapAttrs' makePr (builtins.fromJSON (builtins.readFile prs));
+  jobsetsAttrs = processedPrs //
+    genAttrs ["master" "pending"] branchJobset;
+in {
+  jobsets = pkgs.writeText "spec.json" (builtins.toJSON jobsetsAttrs);
+}
diff --git a/release.nix b/release.nix
new file mode 100644
index 0000000..5872a5a
--- /dev/null
+++ b/release.nix
@@ -0,0 +1,20 @@
+{}:
+let matrix = [
+      { compiler = "ghc843"; doStrict = false; doTracing = false; }
+      { compiler = "ghc843"; doStrict = false; doTracing = true;  }
+
+      # Broken
+      # { compiler = "ghc802"; doStrict = false; doTracing = false; }
+      # { compiler = "ghc802"; doStrict = false; doTracing = true;  }
+
+      # Deprecated
+      # { compiler = "ghc822"; doStrict = true;  doTracing = false; }
+      # { compiler = "ghc822"; doStrict = true;  doTracing = true;  }
+
+      # Broken
+      # { compiler = "ghcjs";  doStrict = false; doTracing = false; }
+    ];
+    boolToString = x: if x then "true" else "false";
+    nameForConfig = {compiler, doStrict, doTracing}: builtins.concatStringsSep "-"
+      [ compiler (boolToString doStrict) (boolToString doTracing) ];
+in builtins.listToAttrs (map (args: { name = nameForConfig args; value = import ./. args; }) matrix)