diff --git a/Makefile b/Makefile
index cb6eeb573..6c96ef5db 100644
--- a/Makefile
+++ b/Makefile
@@ -98,7 +98,7 @@ ifdef HOST_WINDOWS
   GLOBAL_LDFLAGS += -Wl,--export-all-symbols
 endif
 
-GLOBAL_CXXFLAGS += -g -Wall -Wdeprecated-copy -Wimplicit-fallthrough -include $(buildprefix)config.h -std=c++2a -I src
+GLOBAL_CXXFLAGS += -g -Wall -Wdeprecated-copy -Wignored-qualifiers -Wimplicit-fallthrough -include $(buildprefix)config.h -std=c++2a -I src
 
 # Include the main lib, causing rules to be defined
 
diff --git a/src/libfetchers/tarball.cc b/src/libfetchers/tarball.cc
index d03ff82ce..5de367052 100644
--- a/src/libfetchers/tarball.cc
+++ b/src/libfetchers/tarball.cc
@@ -202,7 +202,7 @@ struct CurlInputScheme : InputScheme
 {
     const std::set<std::string> transportUrlSchemes = {"file", "http", "https"};
 
-    const bool hasTarballExtension(std::string_view path) const
+    bool hasTarballExtension(std::string_view path) const
     {
         return hasSuffix(path, ".zip") || hasSuffix(path, ".tar")
             || hasSuffix(path, ".tgz") || hasSuffix(path, ".tar.gz")