8 files changed, 13 insertions, 13 deletions
diff --git a/tvix/build/default.nix b/tvix/build/default.nix
index aafab92fd525..17b52354bbeb 100644
--- a/tvix/build/default.nix
+++ b/tvix/build/default.nix
@@ -4,8 +4,8 @@
   runTests = true;
 }).overrideAttrs (old: rec {
   meta.ci.targets = lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
-  passthru = depot.tvix.utils.mkFeaturePowerset {
+  passthru = old.passthru // (depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
     features = [ "tonic-reflection" ];
-  };
+  });
 })
diff --git a/tvix/cli/default.nix b/tvix/cli/default.nix
index 90394f6d28c7..64dca0ab4bec 100644
--- a/tvix/cli/default.nix
+++ b/tvix/cli/default.nix
@@ -94,5 +94,5 @@ in
   };
 
   # Expose benchmarks and evalTests as standard CI targets.
-  passthru = benchmarks // evalTests;
+  passthru = previousAttrs.passthru // benchmarks // evalTests;
 })
diff --git a/tvix/eval/default.nix b/tvix/eval/default.nix
index 9dd5875f85a5..9370c81ced1c 100644
--- a/tvix/eval/default.nix
+++ b/tvix/eval/default.nix
@@ -8,9 +8,9 @@
   testInputs = [ pkgs.nix ];
 }).overrideAttrs (old: rec {
   meta.ci.targets = lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
-  passthru = depot.tvix.utils.mkFeaturePowerset {
+  passthru = old.passthru // (depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
     features = [ "nix_tests" ];
     override.testInputs = [ pkgs.nix ];
-  };
+  });
 })
diff --git a/tvix/glue/default.nix b/tvix/glue/default.nix
index e2b36e94b87f..0ead94a504c3 100644
--- a/tvix/glue/default.nix
+++ b/tvix/glue/default.nix
@@ -7,11 +7,11 @@
   '';
 }).overrideAttrs (old: rec {
   meta.ci.targets = lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
-  passthru = depot.tvix.utils.mkFeaturePowerset {
+  passthru = old.passthru // (depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
     features = [ "nix_tests" ];
     override.testPreRun = ''
       export SSL_CERT_FILE=/dev/null
     '';
-  };
+  });
 })
diff --git a/tvix/nar-bridge/default.nix b/tvix/nar-bridge/default.nix
index 3e116a1fc02b..2f1384e8211f 100644
--- a/tvix/nar-bridge/default.nix
+++ b/tvix/nar-bridge/default.nix
@@ -4,7 +4,7 @@
   runTests = true;
 }).overrideAttrs (old: rec {
   meta.ci.targets = lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
-  passthru = (depot.tvix.utils.mkFeaturePowerset {
+  passthru = old.passthru // (depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
     features = [ "otlp" ];
   });
diff --git a/tvix/nix-compat/default.nix b/tvix/nix-compat/default.nix
index 08b053b77dd1..34938e3d6428 100644
--- a/tvix/nix-compat/default.nix
+++ b/tvix/nix-compat/default.nix
@@ -4,8 +4,8 @@
   runTests = true;
 }).overrideAttrs (old: rec {
   meta.ci.targets = lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
-  passthru = depot.tvix.utils.mkFeaturePowerset {
+  passthru = old.passthru // (depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
     features = [ "async" "wire" ];
-  };
+  });
 })
diff --git a/tvix/store/default.nix b/tvix/store/default.nix
index b8541d072224..863ddb6de23f 100644
--- a/tvix/store/default.nix
+++ b/tvix/store/default.nix
@@ -35,7 +35,7 @@ in
     targets = [ "integration-tests" ] ++ lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
     extraSteps.import-docs = (mkImportCheck "tvix/docs/src/store" ../docs/src/store);
   };
-  passthru = (depot.tvix.utils.mkFeaturePowerset {
+  passthru = old.passthru // (depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
     features = ([ "cloud" "fuse" "otlp" "tonic-reflection" "xp-store-composition" ]
       # virtiofs feature currently fails to build on Darwin
diff --git a/tvix/tracing/default.nix b/tvix/tracing/default.nix
index ef1985cb47fb..b519d0ffc0b3 100644
--- a/tvix/tracing/default.nix
+++ b/tvix/tracing/default.nix
@@ -4,8 +4,8 @@
   runTests = true;
 }).overrideAttrs (old: rec {
   meta.ci.targets = lib.filter (x: lib.hasPrefix "with-features" x || x == "no-features") (lib.attrNames passthru);
-  passthru = depot.tvix.utils.mkFeaturePowerset {
+  passthru = old.passthru // (depot.tvix.utils.mkFeaturePowerset {
     inherit (old) crateName;
     features = [ "otlp" "tracy" "tonic" "reqwest" "axum" ];
-  };
+  });
 })