diff --git a/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix b/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
index b9c719a4c78b..0051961d9f17 100644
--- a/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
+++ b/pkgs/build-support/build-fhs-userenv-bubblewrap/env.nix
@@ -156,7 +156,7 @@ let
     done
     cd ..
 
-    for i in var etc; do
+    for i in var etc opt; do
       if [ -d "${staticUsrProfileTarget}/$i" ]; then
         cp -rsHf "${staticUsrProfileTarget}/$i" "$i"
       fi
diff --git a/pkgs/build-support/build-fhs-userenv/chrootenv/chrootenv.c b/pkgs/build-support/build-fhs-userenv/chrootenv/chrootenv.c
index 324c9d24ba04..c109d7297e17 100644
--- a/pkgs/build-support/build-fhs-userenv/chrootenv/chrootenv.c
+++ b/pkgs/build-support/build-fhs-userenv/chrootenv/chrootenv.c
@@ -18,7 +18,7 @@
   if (expr)                                                                    \
     fail(#expr, errno);
 
-const gchar *bind_blacklist[] = {"bin", "etc", "host", "real-host", "usr", "lib", "lib64", "lib32", "sbin", NULL};
+const gchar *bind_blacklist[] = {"bin", "etc", "host", "real-host", "usr", "lib", "lib64", "lib32", "sbin", "opt", NULL};
 
 int pivot_root(const char *new_root, const char *put_old) {
   return syscall(SYS_pivot_root, new_root, put_old);
diff --git a/pkgs/build-support/build-fhs-userenv/env.nix b/pkgs/build-support/build-fhs-userenv/env.nix
index da4521b4de3b..44c8adb06e18 100644
--- a/pkgs/build-support/build-fhs-userenv/env.nix
+++ b/pkgs/build-support/build-fhs-userenv/env.nix
@@ -184,7 +184,7 @@ let
     done
     cd ..
 
-    for i in var etc; do
+    for i in var etc opt; do
       if [ -d "${staticUsrProfileTarget}/$i" ]; then
         cp -rsHf "${staticUsrProfileTarget}/$i" "$i"
       fi