2 files changed, 2 insertions, 1 deletions
diff --git a/pkgs/build-support/build-sandbox/src/setup.c b/pkgs/build-support/build-sandbox/src/setup.c
index 18b288d9..e4304b1f 100644
--- a/pkgs/build-support/build-sandbox/src/setup.c
+++ b/pkgs/build-support/build-sandbox/src/setup.c
@@ -120,7 +120,7 @@ static bool makedirs(const char *path, bool do_cache)
     return true;
 }
 
-static char *get_mount_target(const char *path)
+char *get_mount_target(const char *path)
 {
     size_t pathlen = strlen(path), rootdir_len = strlen(FS_ROOT_DIR);
     char *target;
diff --git a/pkgs/build-support/build-sandbox/src/setup.h b/pkgs/build-support/build-sandbox/src/setup.h
index 2ef05482..6d9dd0a3 100644
--- a/pkgs/build-support/build-sandbox/src/setup.h
+++ b/pkgs/build-support/build-sandbox/src/setup.h
@@ -5,6 +5,7 @@
 #include <sys/types.h>
 #include "nix-query.h"
 
+char *get_mount_target(const char *path);
 bool write_maps(pid_t parent_pid);
 bool bind_mount(const char *path, bool rdonly, bool restricted, bool resolve);
 bool extra_mount(const char *path, bool is_required);