--- plugins/unshare.c.orig	2025-02-19 15:29:33.000000000 +0000
+++ plugins/unshare.c	2025-03-07 13:21:21.145450130 +0000
@@ -15,6 +15,16 @@
 static ARGV_t private_mounts = NULL;
 static int unshare_flags = 0;
 
+static int in_chroot()
+{
+    struct stat sta, stb;
+    if (stat("/", &sta))
+	return 0;
+    if (stat("/proc/1/root", &stb))
+	return 1;       /* proc not mounted, assume chroot */
+    return sta.st_dev == stb.st_dev && sta.st_ino == stb.st_ino ? 0 : 1;
+}
+
 static rpmRC unshare_init(rpmPlugin plugin, rpmts ts)
 {
     char *paths = rpmExpand("%{?__transaction_unshare_paths}", NULL);
@@ -24,7 +34,7 @@ static rpmRC unshare_init(rpmPlugin plug
 	 * Changing mount propagation from inside a chroot fails if the root
 	 * is not also a mount point, disable for now.
 	 */
-	if (strcmp(rpmtsRootDir(ts), "/")) {
+	if (strcmp(rpmtsRootDir(ts), "/") || in_chroot()) {
 	    rpmlog(RPMLOG_WARNING,
 			"private mounts in chroot not implemented\n");
 	} else {