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-rwxr-xr-xsrc/nix-build/nix-build.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix-build/nix-build.cc b/src/nix-build/nix-build.cc
index c6a4d416648f..33ad28704a61 100755
--- a/src/nix-build/nix-build.cc
+++ b/src/nix-build/nix-build.cc
@@ -280,7 +280,7 @@ static void _main(int argc, char * * argv)
                 auto absolute = i;
                 try {
                     absolute = canonPath(absPath(i), true);
-                } catch (Error e) {};
+                } catch (Error & e) {};
                 if (store->isStorePath(absolute) && std::regex_match(absolute, std::regex(".*\\.drv(!.*)?")))
                 drvs.push_back(DrvInfo(*state, store, absolute));
             else