fixes to merged code

2 files changed, 2 insertions, 1 deletions

diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index 137fe7198..a185d5785 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -2,6 +2,7 @@
 
 #include "value.hh"
 #include "symbol-table.hh"
+#include "error.hh"
 
 #include <map>
 
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index 10e8c6b42..657ce3001 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -1124,7 +1124,7 @@ static void prim_toFile(EvalState & state, const Pos & pos, Value * * args, Valu
                 ErrorInfo { 
                     .hint = hintfmt(
                         "in 'toFile': the file named '%1%' must not contain a reference "
-                        "to a derivation but contains (%2%)"
+                        "to a derivation but contains (%2%)",
                         name,
                         path),
                     .nixCode = NixCode { .errPos = pos }