diff --git a/ct/cloudflared.sh b/ct/cloudflared.sh
index 861c93f84..8f1f0564f 100644
--- a/ct/cloudflared.sh
+++ b/ct/cloudflared.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+_CS_DEFAULT_URL="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main"
+_cs_boot="${COMMUNITY_SCRIPTS_CORE_DIR:-$(dirname "${BASH_SOURCE[0]}")/../../core}/core/build.func"
+source "$_cs_boot" 2>/dev/null || source <(curl -fsSL "${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}/core/build.func")
 # Copyright (c) 2021-2026 tteck
 # Author: tteck (tteckster)
 # License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
diff --git a/ct/n8n.sh b/ct/n8n.sh
index 658a19b6c..41341e816 100644
--- a/ct/n8n.sh
+++ b/ct/n8n.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+_CS_DEFAULT_URL="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main"
+_cs_boot="${COMMUNITY_SCRIPTS_CORE_DIR:-$(dirname "${BASH_SOURCE[0]}")/../../core}/core/build.func"
+source "$_cs_boot" 2>/dev/null || source <(curl -fsSL "${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}/core/build.func")
 # Copyright (c) 2021-2026 tteck
 # Author: tteck (tteckster)
 # License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
diff --git a/ct/qbittorrent.sh b/ct/qbittorrent.sh
index 9ffb5260d..30d2f516f 100644
--- a/ct/qbittorrent.sh
+++ b/ct/qbittorrent.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+_CS_DEFAULT_URL="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main"
+_cs_boot="${COMMUNITY_SCRIPTS_CORE_DIR:-$(dirname "${BASH_SOURCE[0]}")/../../core}/core/build.func"
+source "$_cs_boot" 2>/dev/null || source <(curl -fsSL "${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}/core/build.func")
 # Copyright (c) 2021-2026 community-scripts ORG
 # Author: tteck (tteckster) | Co-Author: Slaviša Arežina (tremor021)
 # License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
diff --git a/ct/technitiumdns.sh b/ct/technitiumdns.sh
index 345ff9eb1..9eab7967b 100644
--- a/ct/technitiumdns.sh
+++ b/ct/technitiumdns.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+_CS_DEFAULT_URL="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main"
+_cs_boot="${COMMUNITY_SCRIPTS_CORE_DIR:-$(dirname "${BASH_SOURCE[0]}")/../../core}/core/build.func"
+source "$_cs_boot" 2>/dev/null || source <(curl -fsSL "${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}/core/build.func")
 # Copyright (c) 2021-2026 tteck
 # Author: tteck (tteckster)
 # License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE
diff --git a/ct/uptimekuma.sh b/ct/uptimekuma.sh
index 313a31906..4dd02f9e5 100644
--- a/ct/uptimekuma.sh
+++ b/ct/uptimekuma.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/build.func)
+_CS_DEFAULT_URL="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main"
+_cs_boot="${COMMUNITY_SCRIPTS_CORE_DIR:-$(dirname "${BASH_SOURCE[0]}")/../../core}/core/build.func"
+source "$_cs_boot" 2>/dev/null || source <(curl -fsSL "${COMMUNITY_SCRIPTS_CORE_URL:-https://raw.githubusercontent.com/community-scripts/core/main}/core/build.func")
 # Copyright (c) 2021-2026 tteck
 # Author: tteck (tteckster)
 # License: MIT | https://github.com/community-scripts/ProxmoxVE/raw/main/LICENSE