diff --git a/iridium_installer/backend/os_install.py b/iridium_installer/backend/os_install.py
index f8eade6..a0823c2 100644
--- a/iridium_installer/backend/os_install.py
+++ b/iridium_installer/backend/os_install.py
@@ -132,18 +132,35 @@ def install_minimal_os(mount_root, releasever="43"):
     ]
 
     # Offline installation logic
-    iso_repo = "/run/install/repo"
-    dnf_args = []
+    possible_repos = [
+        "/run/install/repo",
+        "/run/install/source",
+        "/mnt/install/repo",
+        "/run/initramfs/live",
+    ]
     
-    if os.path.exists(iso_repo):
+    iso_repo = None
+    for path in possible_repos:
+        if os.path.exists(os.path.join(path, "repodata")):
+            iso_repo = path
+            break
+        elif os.path.exists(os.path.join(path, "Packages")):
+            iso_repo = path
+            break
+
+    dnf_args = []
+    if iso_repo:
         logger.info(f"Found ISO repository at {iso_repo}. Using strictly offline mode.")
         dnf_args = [
             "--disablerepo=*",
             f"--repofrompath=iridium-iso,{iso_repo}",
-            "--enablerepo=iridium-iso"
+            "--enablerepo=iridium-iso",
+            "--offline",
         ]
     else:
-        logger.warning(f"ISO repository not found at {iso_repo}. Trying to use host config (may require network).")
+        logger.warning("ISO repository not found in common locations. DNF might try to use network.")
+        # Try to at least prevent some network usage
+        dnf_args = ["--setopt=localpkg_only=1", "--offline"]
 
     cmd = [
         "dnf",
@@ -151,10 +168,15 @@ def install_minimal_os(mount_root, releasever="43"):
         "-y",
         f"--installroot={mount_root}",
         f"--releasever={releasever}",
-        "--use-host-config",
         "--setopt=install_weak_deps=False",
         "--nodocs",
-    ] + dnf_args + packages
+    ]
+    
+    # Only use host config if we didn't find an ISO repo
+    if not iso_repo:
+        cmd.append("--use-host-config")
+        
+    cmd += dnf_args + packages
 
     with mount_pseudo_fs(mount_root):
         run_command(cmd)