1 files changed, 10 insertions, 2 deletions

diff --git a/src/libexpr/primops/fetchGit.cc b/src/libexpr/primops/fetchGit.cc
index 480cc1adc..68ffed513 100644
--- a/src/libexpr/primops/fetchGit.cc
+++ b/src/libexpr/primops/fetchGit.cc
@@ -217,11 +217,19 @@ static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Va
             else if (n == "name")
                 name = state.forceStringNoCtx(*attr.value, *attr.pos);
             else
-                throw EvalError("unsupported argument '%s' to 'fetchGit', at %s", attr.name, *attr.pos);
+                throw EvalError(
+                    ErrorInfo { 
+                        .hint = hintfmt("unsupported argument '%s' to 'fetchGit'", attr.name),
+                        .nixCode = NixCode { .errPos = *attr.pos }
+                    });
         }
 
         if (url.empty())
-            throw EvalError("'url' argument required, at %1%", pos);
+            throw EvalError(
+                ErrorInfo { 
+                    .hint = hintfmt("'url' argument required"),
+                    .nixCode = NixCode { .errPos = pos }
+                });
 
     } else
         url = state.coerceToString(pos, *args[0], context, false, false);