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-rw-r--r--src/libexpr/names.hh2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libexpr/names.hh b/src/libexpr/names.hh
index 9667fc96fd0f..13c3093e77b0 100644
--- a/src/libexpr/names.hh
+++ b/src/libexpr/names.hh
@@ -24,6 +24,8 @@ private:
 
 typedef list<DrvName> DrvNames;
 
+string nextComponent(string::const_iterator & p,
+    const string::const_iterator end);
 int compareVersions(const string & v1, const string & v2);
 DrvNames drvNamesFromArgs(const Strings & opArgs);