diff --git a/pkgs/build-support/setup-hooks/separate-debug-info.sh b/pkgs/build-support/setup-hooks/separate-debug-info.sh
index 55e3236847d..617bbba5845 100644
--- a/pkgs/build-support/setup-hooks/separate-debug-info.sh
+++ b/pkgs/build-support/setup-hooks/separate-debug-info.sh
@@ -18,6 +18,7 @@ _separateDebugInfo() {
         # Skip non-ELF files.
         exec 10< "$i"
         read -n 4 -u 10 magic
+        if ! [[ "$magic" =~ ELF ]]; then continue; fi
         exec 10<&-
 
         # Extract the Build ID. FIXME: there's probably a cleaner way.