diff --git a/src/libexpr-tests/derived-path.cc b/src/libexpr-tests/derived-path.cc
index d5fc6f201..634f9bf69 100644
--- a/src/libexpr-tests/derived-path.cc
+++ b/src/libexpr-tests/derived-path.cc
@@ -44,11 +44,11 @@ RC_GTEST_FIXTURE_PROP(
      * to worry about race conditions if the tests run concurrently.
      */
     ExperimentalFeatureSettings mockXpSettings;
-    mockXpSettings.set("experimental-features", "ca-derivations");
+    mockXpSettings.set("experimental-features", "ca-derivations dynamic-derivations");
 
     auto * v = state.allocValue();
     state.mkOutputString(*v, b, std::nullopt, mockXpSettings);
-    auto [d, _] = state.coerceToSingleDerivedPathUnchecked(noPos, *v, "");
+    auto [d, _] = state.coerceToSingleDerivedPathUnchecked(noPos, *v, "", mockXpSettings);
     RC_ASSERT(SingleDerivedPath { b } == d);
 }
 
@@ -57,9 +57,12 @@ RC_GTEST_FIXTURE_PROP(
     prop_derived_path_built_out_path_round_trip,
     (const SingleDerivedPath::Built & b, const StorePath & outPath))
 {
+    ExperimentalFeatureSettings mockXpSettings;
+    mockXpSettings.set("experimental-features", "dynamic-derivations");
+
     auto * v = state.allocValue();
-    state.mkOutputString(*v, b, outPath);
-    auto [d, _] = state.coerceToSingleDerivedPathUnchecked(noPos, *v, "");
+    state.mkOutputString(*v, b, outPath, mockXpSettings);
+    auto [d, _] = state.coerceToSingleDerivedPathUnchecked(noPos, *v, "", mockXpSettings);
     RC_ASSERT(SingleDerivedPath { b } == d);
 }
 
diff --git a/src/libexpr-tests/value/context.cc b/src/libexpr-tests/value/context.cc
index 761286dbd..c8d62772f 100644
--- a/src/libexpr-tests/value/context.cc
+++ b/src/libexpr-tests/value/context.cc
@@ -124,7 +124,9 @@ RC_GTEST_PROP(
     prop_round_rip,
     (const NixStringContextElem & o))
 {
-    RC_ASSERT(o == NixStringContextElem::parse(o.to_string()));
+    ExperimentalFeatureSettings xpSettings;
+    xpSettings.set("experimental-features", "dynamic-derivations");
+    RC_ASSERT(o == NixStringContextElem::parse(o.to_string(), xpSettings));
 }
 
 #endif
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index b9b89773f..2dcee49d9 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -2245,18 +2245,18 @@ std::string_view EvalState::forceString(Value & v, const PosIdx pos, std::string
 }
 
 
-void copyContext(const Value & v, NixStringContext & context)
+void copyContext(const Value & v, NixStringContext & context, const ExperimentalFeatureSettings & xpSettings)
 {
     if (v.payload.string.context)
         for (const char * * p = v.payload.string.context; *p; ++p)
-            context.insert(NixStringContextElem::parse(*p));
+            context.insert(NixStringContextElem::parse(*p, xpSettings));
 }
 
 
-std::string_view EvalState::forceString(Value & v, NixStringContext & context, const PosIdx pos, std::string_view errorCtx)
+std::string_view EvalState::forceString(Value & v, NixStringContext & context, const PosIdx pos, std::string_view errorCtx, const ExperimentalFeatureSettings & xpSettings)
 {
     auto s = forceString(v, pos, errorCtx);
-    copyContext(v, context);
+    copyContext(v, context, xpSettings);
     return s;
 }
 
@@ -2462,10 +2462,10 @@ StorePath EvalState::coerceToStorePath(const PosIdx pos, Value & v, NixStringCon
 }
 
 
-std::pair<SingleDerivedPath, std::string_view> EvalState::coerceToSingleDerivedPathUnchecked(const PosIdx pos, Value & v, std::string_view errorCtx)
+std::pair<SingleDerivedPath, std::string_view> EvalState::coerceToSingleDerivedPathUnchecked(const PosIdx pos, Value & v, std::string_view errorCtx, const ExperimentalFeatureSettings & xpSettings)
 {
     NixStringContext context;
-    auto s = forceString(v, context, pos, errorCtx);
+    auto s = forceString(v, context, pos, errorCtx, xpSettings);
     auto csize = context.size();
     if (csize != 1)
         error<EvalError>(
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 5e3e915c6..8bb8bbd32 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -159,7 +159,7 @@ void printEnvBindings(const SymbolTable & st, const StaticEnv & se, const Env &
 
 std::unique_ptr<ValMap> mapStaticEnvBindings(const SymbolTable & st, const StaticEnv & se, const Env & env);
 
-void copyContext(const Value & v, NixStringContext & context);
+void copyContext(const Value & v, NixStringContext & context, const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
 
 
 std::string printValue(EvalState & state, Value & v);
@@ -525,7 +525,7 @@ public:
      */
     void forceFunction(Value & v, const PosIdx pos, std::string_view errorCtx);
     std::string_view forceString(Value & v, const PosIdx pos, std::string_view errorCtx);
-    std::string_view forceString(Value & v, NixStringContext & context, const PosIdx pos, std::string_view errorCtx);
+    std::string_view forceString(Value & v, NixStringContext & context, const PosIdx pos, std::string_view errorCtx, const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
     std::string_view forceStringNoCtx(Value & v, const PosIdx pos, std::string_view errorCtx);
 
     template<typename... Args>
@@ -577,7 +577,7 @@ public:
     /**
      * Part of `coerceToSingleDerivedPath()` without any store IO which is exposed for unit testing only.
      */
-    std::pair<SingleDerivedPath, std::string_view> coerceToSingleDerivedPathUnchecked(const PosIdx pos, Value & v, std::string_view errorCtx);
+    std::pair<SingleDerivedPath, std::string_view> coerceToSingleDerivedPathUnchecked(const PosIdx pos, Value & v, std::string_view errorCtx, const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
 
     /**
      * Coerce to `SingleDerivedPath`.
diff --git a/src/libstore-tests/derived-path.cc b/src/libstore-tests/derived-path.cc
index c62d79a78..64e3a12c9 100644
--- a/src/libstore-tests/derived-path.cc
+++ b/src/libstore-tests/derived-path.cc
@@ -84,7 +84,9 @@ RC_GTEST_FIXTURE_PROP(
     prop_legacy_round_rip,
     (const DerivedPath & o))
 {
-    RC_ASSERT(o == DerivedPath::parseLegacy(*store, o.to_string_legacy(*store)));
+    ExperimentalFeatureSettings xpSettings;
+    xpSettings.set("experimental-features", "dynamic-derivations");
+    RC_ASSERT(o == DerivedPath::parseLegacy(*store, o.to_string_legacy(*store), xpSettings));
 }
 
 RC_GTEST_FIXTURE_PROP(
@@ -92,7 +94,9 @@ RC_GTEST_FIXTURE_PROP(
     prop_round_rip,
     (const DerivedPath & o))
 {
-    RC_ASSERT(o == DerivedPath::parse(*store, o.to_string(*store)));
+    ExperimentalFeatureSettings xpSettings;
+    xpSettings.set("experimental-features", "dynamic-derivations");
+    RC_ASSERT(o == DerivedPath::parse(*store, o.to_string(*store), xpSettings));
 }
 
 #endif