4 files changed, 13 insertions, 9 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 120130eb3..741a24e3c 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -2808,20 +2808,20 @@ Expr & EvalState::parseExprFromFile(const SourcePath & path, std::shared_ptr<Sta
 }
 
 
-Expr & EvalState::parseExprFromString(std::string s_, const SourcePath & basePath, std::shared_ptr<StaticEnv> & staticEnv)
+Expr & EvalState::parseExprFromString(std::string s_, const SourcePath & basePath, std::shared_ptr<StaticEnv> & staticEnv, const ExperimentalFeatureSettings & xpSettings)
 {
     // NOTE this method (and parseStdin) must take care to *fully copy* their input
     // into their respective Pos::Origin until the parser stops overwriting its input
     // data.
     auto s = make_ref<std::string>(s_);
     s_.append("\0\0", 2);
-    return *parse(s_.data(), s_.size(), Pos::String{.source = s}, basePath, staticEnv);
+    return *parse(s_.data(), s_.size(), Pos::String{.source = s}, basePath, staticEnv, xpSettings);
 }
 
 
-Expr & EvalState::parseExprFromString(std::string s, const SourcePath & basePath)
+Expr & EvalState::parseExprFromString(std::string s, const SourcePath & basePath, const ExperimentalFeatureSettings & xpSettings)
 {
-    return parseExprFromString(std::move(s), basePath, staticBaseEnv);
+    return parseExprFromString(std::move(s), basePath, staticBaseEnv, xpSettings);
 }
 
 
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index c1779de15..ff45efc08 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -344,8 +344,8 @@ public:
     /**
      * Parse a Nix expression from the specified string.
      */
-    Expr & parseExprFromString(std::string s, const SourcePath & basePath, std::shared_ptr<StaticEnv> & staticEnv);
-    Expr & parseExprFromString(std::string s, const SourcePath & basePath);
+    Expr & parseExprFromString(std::string s, const SourcePath & basePath, std::shared_ptr<StaticEnv> & staticEnv, const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
+    Expr & parseExprFromString(std::string s, const SourcePath & basePath, const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
 
     Expr & parseStdin();
 
@@ -568,7 +568,8 @@ private:
         size_t length,
         Pos::Origin origin,
         const SourcePath & basePath,
-        std::shared_ptr<StaticEnv> & staticEnv);
+        std::shared_ptr<StaticEnv> & staticEnv,
+        const ExperimentalFeatureSettings & xpSettings = experimentalFeatureSettings);
 
     /**
      * Current Nix call stack depth, used with `max-call-depth` setting to throw stack overflow hopefully before we run out of system stack.
diff --git a/src/libexpr/parser/parser.cc b/src/libexpr/parser/parser.cc
index b7a105fe7..68aa3ddc5 100644
--- a/src/libexpr/parser/parser.cc
+++ b/src/libexpr/parser/parser.cc
@@ -631,7 +631,7 @@ template<> struct BuildAST<grammar::expr::path> : p::maybe_nothing {};
 
 template<> struct BuildAST<grammar::expr::uri> {
     static void apply(const auto & in, ExprState & s, State & ps) {
-       static bool noURLLiterals = experimentalFeatureSettings.isEnabled(Xp::NoUrlLiterals);
+       bool noURLLiterals = ps.xpSettings.isEnabled(Xp::NoUrlLiterals);
        if (noURLLiterals)
            throw ParseError({
                .msg = HintFmt("URL literals are disabled"),
@@ -832,7 +832,8 @@ Expr * EvalState::parse(
     size_t length,
     Pos::Origin origin,
     const SourcePath & basePath,
-    std::shared_ptr<StaticEnv> & staticEnv)
+    std::shared_ptr<StaticEnv> & staticEnv,
+    const ExperimentalFeatureSettings & xpSettings)
 {
     parser::State s = {
         symbols,
@@ -840,6 +841,7 @@ Expr * EvalState::parse(
         basePath,
         positions.addOrigin(origin, length),
         exprSymbols,
+        xpSettings
     };
     parser::ExprState x;
 
diff --git a/src/libexpr/parser/state.hh b/src/libexpr/parser/state.hh
index 29889152e..30803a37e 100644
--- a/src/libexpr/parser/state.hh
+++ b/src/libexpr/parser/state.hh
@@ -19,6 +19,7 @@ struct State
     SourcePath basePath;
     PosTable::Origin origin;
     const Expr::AstSymbols & s;
+    const ExperimentalFeatureSettings & xpSettings;
 
     void dupAttr(const AttrPath & attrPath, const PosIdx pos, const PosIdx prevPos);
     void dupAttr(Symbol attr, const PosIdx pos, const PosIdx prevPos);