2 files changed, 1 insertions, 14 deletions
diff --git a/src/libstore/derivations.cc b/src/libstore/derivations.cc
index ce1ac7d33229..38a87240c3ce 100644
--- a/src/libstore/derivations.cc
+++ b/src/libstore/derivations.cc
@@ -152,7 +152,7 @@ static StringSet parseStrings(std::istream & str, bool arePaths)
 static Derivation parseDerivation(const string & s)
 {
     Derivation drv;
-    std::istringstream str(s);
+    istringstream_nocopy str(s);
     expect(str, "Derive([");
 
     /* Parse the list of outputs. */
diff --git a/src/libstore/s3-binary-cache-store.cc b/src/libstore/s3-binary-cache-store.cc
index 041c68c6816f..1121b4d4cd06 100644
--- a/src/libstore/s3-binary-cache-store.cc
+++ b/src/libstore/s3-binary-cache-store.cc
@@ -117,17 +117,6 @@ S3Helper::DownloadResult S3Helper::getObject(
     return res;
 }
 
-#if __linux__
-
-struct istringstream_nocopy : public std::stringstream
-{
-    istringstream_nocopy(const std::string & s)
-    {
-        rdbuf()->pubsetbuf(
-            (char *) s.data(), s.size());
-    }
-};
-
 struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore
 {
     std::string bucketName;
@@ -313,8 +302,6 @@ static RegisterStoreImplementation regStore([](
     return store;
 });
 
-#endif
-
 }
 
 #endif