diff --git a/lix/legacy/build-remote.cc b/lix/legacy/build-remote.cc
index dbf255b6e..8bb294fb3 100644
--- a/lix/legacy/build-remote.cc
+++ b/lix/legacy/build-remote.cc
@@ -346,31 +346,12 @@ connected:
         }
 
 
-        auto outputHashes = aio.blockOn(staticOutputHashes(*store, drv));
-        std::set<Realisation> missingRealisations;
         StorePathSet missingPaths;
-        if (experimentalFeatureSettings.isEnabled(Xp::CaDerivations) && !drv.type().hasKnownOutputPaths()) {
-            for (auto & outputName : wantedOutputs) {
-                auto thisOutputHash = outputHashes.at(outputName);
-                auto thisOutputId = DrvOutput{ thisOutputHash, outputName };
-                if (!aio.blockOn(store->queryRealisation(thisOutputId))) {
-                    debug("missing output %s", outputName);
-                    assert(optResult);
-                    auto & result = *optResult;
-                    auto i = result.builtOutputs.find(outputName);
-                    assert(i != result.builtOutputs.end());
-                    auto & newRealisation = i->second;
-                    missingRealisations.insert(newRealisation);
-                    missingPaths.insert(newRealisation.outPath);
-                }
-            }
-        } else {
-            auto outputPaths = drv.outputsAndOptPaths(*store);
-            for (auto & [outputName, hopefullyOutputPath] : outputPaths) {
-                assert(hopefullyOutputPath.second);
-                if (!aio.blockOn(store->isValidPath(*hopefullyOutputPath.second)))
-                    missingPaths.insert(*hopefullyOutputPath.second);
-            }
+        auto outputPaths = drv.outputsAndOptPaths(*store);
+        for (auto & [outputName, hopefullyOutputPath] : outputPaths) {
+            assert(hopefullyOutputPath.second);
+            if (!aio.blockOn(store->isValidPath(*hopefullyOutputPath.second)))
+                missingPaths.insert(*hopefullyOutputPath.second);
         }
 
         if (!missingPaths.empty()) {
@@ -382,13 +363,6 @@ connected:
                 copyPaths(*sshStore, *store, missingPaths, NoRepair, NoCheckSigs, NoSubstitute)
             );
         }
-        // XXX: Should be done as part of `copyPaths`
-        for (auto & realisation : missingRealisations) {
-            // Should hold, because if the feature isn't enabled the set
-            // of missing realisations should be empty
-            experimentalFeatureSettings.require(Xp::CaDerivations);
-            aio.blockOn(store->registerDrvOutput(realisation));
-        }
 
         return 0;
     }
diff --git a/lix/libstore/build/derivation-goal.cc b/lix/libstore/build/derivation-goal.cc
index 337dd9f4a..344a4fbc8 100644
--- a/lix/libstore/build/derivation-goal.cc
+++ b/lix/libstore/build/derivation-goal.cc
@@ -219,9 +219,6 @@ try {
 
     parsedDrv = std::make_unique<ParsedDerivation>(drvPath, *drv);
 
-    if (!drv->type().hasKnownOutputPaths())
-        throw UnimplementedError("ca derivations are not supported");
-
     for (auto & i : drv->outputsAndOptPaths(worker.store))
         if (i.second.second)
             TRY_AWAIT(worker.store.addTempRoot(*i.second.second));
@@ -1430,39 +1427,20 @@ void DerivationGoal::flushLine()
 
 kj::Promise<Result<std::map<std::string, std::optional<StorePath>>>> DerivationGoal::queryPartialDerivationOutputMap()
 try {
-    if (!useDerivation || drv->type().hasKnownOutputPaths()) {
-        std::map<std::string, std::optional<StorePath>> res;
-        for (auto & [name, output] : drv->outputs)
-            res.insert_or_assign(name, output.path(worker.store, drv->name, name));
-        co_return res;
-    } else {
-        for (auto * drvStore : {&worker.evalStore, &worker.store}) {
-            if (TRY_AWAIT(drvStore->isValidPath(drvPath))) {
-                co_return TRY_AWAIT(worker.store.queryPartialDerivationOutputMap(drvPath, drvStore)
-                );
-            }
-        }
-        assert(false);
-    }
+    std::map<std::string, std::optional<StorePath>> res;
+    for (auto & [name, output] : drv->outputs)
+        res.insert_or_assign(name, output.path(worker.store, drv->name, name));
+    co_return res;
 } catch (...) {
     co_return result::current_exception();
 }
 
 kj::Promise<Result<OutputPathMap>> DerivationGoal::queryDerivationOutputMap()
 try {
-    if (!useDerivation || drv->type().hasKnownOutputPaths()) {
-        OutputPathMap res;
-        for (auto & [name, output] : drv->outputsAndOptPaths(worker.store))
-            res.insert_or_assign(name, *output.second);
-        co_return res;
-    } else {
-        for (auto * drvStore : {&worker.evalStore, &worker.store}) {
-            if (TRY_AWAIT(drvStore->isValidPath(drvPath))) {
-                co_return TRY_AWAIT(worker.store.queryDerivationOutputMap(drvPath, drvStore));
-            }
-        }
-        assert(false);
-    }
+    OutputPathMap res;
+    for (auto & [name, output] : drv->outputsAndOptPaths(worker.store))
+        res.insert_or_assign(name, *output.second);
+    co_return res;
 } catch (...) {
     co_return result::current_exception();
 }
diff --git a/lix/libstore/derivations.cc b/lix/libstore/derivations.cc
index e1c0d3c7e..f0c6e2188 100644
--- a/lix/libstore/derivations.cc
+++ b/lix/libstore/derivations.cc
@@ -65,19 +65,6 @@ bool DerivationType::isFixed() const
     }, raw);
 }
 
-bool DerivationType::hasKnownOutputPaths() const
-{
-    return std::visit(overloaded {
-        [](const InputAddressed & ia) {
-            return true;
-        },
-        [](const ContentAddressed & ca) {
-            return true;
-        },
-    }, raw);
-}
-
-
 bool DerivationType::isSandboxed() const
 {
     return std::visit(overloaded {
diff --git a/lix/libstore/derivations.hh b/lix/libstore/derivations.hh
index bd44e41b8..8b4ff6179 100644
--- a/lix/libstore/derivations.hh
+++ b/lix/libstore/derivations.hh
@@ -169,13 +169,6 @@ struct DerivationType {
      * controlled separately. Always true for non-CA derivations.
      */
     bool isSandboxed() const;
-
-    /**
-     * Does the derivation knows its own output paths?
-     * Only true when there's no floating-ca derivation involved in the
-     * closure, or if fixed output.
-     */
-    bool hasKnownOutputPaths() const;
 };
 
 struct BasicDerivation
diff --git a/lix/libstore/parsed-derivations.cc b/lix/libstore/parsed-derivations.cc
index b133a17c0..e86074450 100644
--- a/lix/libstore/parsed-derivations.cc
+++ b/lix/libstore/parsed-derivations.cc
@@ -96,8 +96,6 @@ StringSet ParsedDerivation::getRequiredSystemFeatures() const
     StringSet res;
     for (auto & i : getStringsAttr("requiredSystemFeatures").value_or(Strings()))
         res.insert(i);
-    if (!drv.type().hasKnownOutputPaths())
-        res.insert("ca-derivations");
     return res;
 }
 
diff --git a/lix/libstore/store-api.cc b/lix/libstore/store-api.cc
index 1a6a9f93e..02449e237 100644
--- a/lix/libstore/store-api.cc
+++ b/lix/libstore/store-api.cc
@@ -1447,18 +1447,6 @@ try {
         }
     }
 
-    if (!experimentalFeatureSettings.isEnabled(Xp::CaDerivations) || !TRY_AWAIT(isValidPath(path)))
-        co_return path;
-
-    auto drv = TRY_AWAIT(readDerivation(path));
-    if (!drv.type().hasKnownOutputPaths()) {
-        // The build log is actually attached to the corresponding
-        // resolved derivation, so we need to get it first
-        auto resolvedDrv = TRY_AWAIT(drv.tryResolve(*this));
-        if (resolvedDrv)
-            co_return TRY_AWAIT(writeDerivation(*this, *resolvedDrv, NoRepair, true));
-    }
-
     co_return path;
 } catch (...) {
     co_return result::current_exception();