diff --git a/artiq-fast/artiq-board.nix b/artiq-fast/artiq-board.nix
index f74b0c9..8799882 100644
--- a/artiq-fast/artiq-board.nix
+++ b/artiq-fast/artiq-board.nix
@@ -9,7 +9,7 @@
 
 let
   artiqSrc = import ./pkgs/artiq-src.nix { fetchgit = pkgs.fetchgit; };
-  artiqpkgs = import ./default.nix { inherit pkgs; };
+  artiqpkgs = builtins.trace "artiqpkgs" (import ./default.nix { inherit pkgs; });
   fetchcargo = import ./fetchcargo.nix {
     inherit (pkgs) stdenv cacert git;
     inherit (artiqpkgs) cargo cargo-vendor;
@@ -44,7 +44,7 @@ let
       '';
   };
 
-  vivado = import ./vivado.nix { inherit pkgs; };
+  vivado = builtins.trace "vivado" (import ./vivado.nix { inherit pkgs; });
 
 # Board packages are Python modules so that they get added to the ARTIQ Python
 # environment, and artiq_flash finds them.
diff --git a/artiq-fast/pkgs/artiq.nix b/artiq-fast/pkgs/artiq.nix
index 1ae7a35..47d50a1 100644
--- a/artiq-fast/pkgs/artiq.nix
+++ b/artiq-fast/pkgs/artiq.nix
@@ -3,7 +3,7 @@
 let
   pythonDeps = callPackage ./python-deps.nix {};
 in
-  python3Packages.buildPythonPackage rec {
+  builtins.trace "artiq" (python3Packages.buildPythonPackage rec {
     name = "artiq-${version}";
     version = import ./artiq-version.nix { inherit stdenv fetchgit git; };
     src = import ./artiq-src.nix { inherit fetchgit; };
@@ -26,4 +26,4 @@ in
       license = licenses.lgpl3;
       maintainers = [ maintainers.sb0 ];
     };
-  }
+  })
diff --git a/artiq-full.nix b/artiq-full.nix
index 90253d4..0d9de8d 100644
--- a/artiq-full.nix
+++ b/artiq-full.nix
@@ -3,7 +3,7 @@
 let
   sinaraSystemsSrc = <sinaraSystemsSrc>;
 
-  generatedNix = pkgs.runCommand "generated-nix" { buildInputs = [ pkgs.nix pkgs.git ]; }
+  generatedNix = builtins.trace "full generatedNix" (pkgs.runCommand "generated-nix" { buildInputs = [ pkgs.nix pkgs.git ]; }
     ''
     mkdir $out
 
@@ -243,7 +243,7 @@ let
         };
       }
     EOF
-    '';
+    '');
   pythonDeps = import ./artiq-full/python-deps.nix { inherit pkgs; };
   sipycoManualPackages = import ./artiq-full/sipyco-manual.nix {
     inherit (pkgs) stdenv lib python3Packages texlive texinfo;
@@ -260,7 +260,7 @@ let
     matplotlib-qt = pkgs.lib.hydraJob (pkgs.python3Packages.matplotlib.override { enableQt = true; });
   };
 in
-  builtins.mapAttrs (key: value: pkgs.lib.hydraJob value) jobs // {
+  builtins.mapAttrs (key: value: builtins.trace "full-${key}" pkgs.lib.hydraJob value) jobs // {
     #artiq-full = pkgs.releaseTools.channel {
     #  name = "artiq-full";
     #  src = generatedNix;