diff --git a/pkgs/build-support/build-fhsenv-chroot/chrootenv/src/chrootenv.c b/pkgs/build-support/build-fhsenv-chroot/chrootenv/src/chrootenv.c
index c109d7297e174..79a92a6edd25b 100644
--- a/pkgs/build-support/build-fhsenv-chroot/chrootenv/src/chrootenv.c
+++ b/pkgs/build-support/build-fhsenv-chroot/chrootenv/src/chrootenv.c
@@ -155,6 +155,8 @@ int main(gint argc, gchar **argv) {
   else {
     int status;
 
+    fail_if(signal(SIGINT, SIG_IGN) == SIG_ERR);
+
     fail_if(waitpid(cpid, &status, 0) != cpid);
     fail_if(rmdir(prefix));