diff --git a/src/libexpr/include/nix/expr/symbol-table.hh b/src/libexpr/include/nix/expr/symbol-table.hh
index 1249bdb88..4dedf3d91 100644
--- a/src/libexpr/include/nix/expr/symbol-table.hh
+++ b/src/libexpr/include/nix/expr/symbol-table.hh
@@ -220,19 +220,7 @@ public:
         // Most symbols are looked up more than once, so we trade off insertion performance
         // for lookup performance.
         // FIXME: make this thread-safe.
-        return [&]<typename T>(T && key) -> Symbol {
-            if constexpr (requires { symbols.insert<T>(key); }) {
-                auto [it, _] = symbols.insert<T>(key);
-                return Symbol(*it);
-            } else {
-                auto it = symbols.find<T>(key);
-                if (it != symbols.end())
-                    return Symbol(*it);
-
-                it = symbols.emplace(key).first;
-                return Symbol(*it);
-            }
-        }(SymbolStr::Key{store, s, stringAlloc});
+        return Symbol(*symbols.insert(SymbolStr::Key{store, s, stringAlloc}).first);
     }
 
     std::vector<SymbolStr> resolve(const std::vector<Symbol> & symbols) const
diff --git a/src/libexpr/meson.build b/src/libexpr/meson.build
index 533030359..43e4b9c98 100644
--- a/src/libexpr/meson.build
+++ b/src/libexpr/meson.build
@@ -41,7 +41,7 @@ boost = dependency(
   'boost',
   modules : ['container', 'context'],
   include_type: 'system',
-  version: '>=1.81.0'
+  version: '>=1.82.0'
 )
 # boost is a public dependency, but not a pkg-config dependency unfortunately, so we
 # put in `deps_other`.