* Strip off the `.nix' suffix from the attribute name for files in

  ~/.nix-defexpr,  otherwise the attribute cannot be selected with the
  `-A' option.  Useful if you want to stick a Nix expression directly
  in ~/.nix-defexpr.

1 files changed, 2 insertions, 3 deletions

diff --git a/src/libstore/derivations.cc b/src/libstore/derivations.cc
index 3456a5f714a0..d0f836cab3d9 100644
--- a/src/libstore/derivations.cc
+++ b/src/libstore/derivations.cc
@@ -2,6 +2,7 @@
 #include "store-api.hh"
 #include "aterm.hh"
 #include "globals.hh"
+#include "util.hh"
 
 #include "derivations-ast.hh"
 #include "derivations-ast.cc"
@@ -163,9 +164,7 @@ ATerm unparseDerivation(const Derivation & drv)
 
 bool isDerivation(const string & fileName)
 {
-    return
-        fileName.size() >= drvExtension.size() &&
-        string(fileName, fileName.size() - drvExtension.size()) == drvExtension;
+    return hasSuffix(fileName, drvExtension);
 }