Restore default signal handling in child processes

In particular, this fixes Ctrl-C in nix-shell sessions.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/nix-build/nix-build.cc b/src/nix-build/nix-build.cc
index 3eb2d2c0b7..ee030c57b6 100755
--- a/src/nix-build/nix-build.cc
+++ b/src/nix-build/nix-build.cc
@@ -452,6 +452,8 @@ int main(int argc, char ** argv)
 
                 auto argPtrs = stringsToCharPtrs(args);
 
+                restoreSignals();
+
                 execvp(getEnv("NIX_BUILD_SHELL", "bash").c_str(), argPtrs.data());
 
                 throw SysError("executing shell");