4 files changed, 20 insertions, 6 deletions

diff --git a/.gitignore b/.gitignore
index c4a847d..fd040a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
-/result
+/.redo
+/*.result
+/*.result-link
diff --git a/default.nix b/default.nix
index 65ea673..6b9e8ab 100644
--- a/default.nix
+++ b/default.nix
@@ -2,8 +2,8 @@
 }:
 
 rec {
-  # servant = pkgs.haskellPackages.callPackage ./servant/servant.nix {
-  #   inherit thermoprint;
-  # };
+  servant = pkgs.haskellPackages.callPackage ./servant/servant.nix {
+    inherit thermoprint;
+  };
   thermoprint = pkgs.haskellPackages.callPackage ./thermoprint/thermoprint.nix {};
 }
diff --git a/default.result.do b/default.result.do
new file mode 100644
index 0000000..f7cf7ef
--- /dev/null
+++ b/default.result.do
@@ -0,0 +1,12 @@
+find $2 -name '*.hs' -print0 | xargs --null redo-ifchange
+
+# Recording cross-component dependencies
+case $2 in
+  servant)
+    redo-ifchange thermoprint.result
+  ;;
+esac
+
+nix-build -A $2 -o $2.result-link 1>&2
+
+exec readlink $2.result-link
\ No newline at end of file
diff --git a/thermoprint/thermoprint.nix b/thermoprint/thermoprint.nix
index 9e90f15..5453c35 100644
--- a/thermoprint/thermoprint.nix
+++ b/thermoprint/thermoprint.nix
@@ -7,8 +7,8 @@ mkDerivation {
   pname = "thermoprint";
   version = "0.0.0";
   src = ./.; 
-  isLibrary = false;
-  isExecutable = true;
+  isLibrary = true;
+  isExecutable = false;
   executableHaskellDepends = [
     base
   ];