diff --git a/src/gpu_rent/remote/bootstrap.sh b/src/gpu_rent/remote/bootstrap.sh
index a359095..ecaeebc 100644
--- a/src/gpu_rent/remote/bootstrap.sh
+++ b/src/gpu_rent/remote/bootstrap.sh
@@ -150,10 +150,19 @@ else
 fi
 
 if [[ ! -x /usr/share/dotnet/dotnet && ! -x "/home/${SWARM_USER}/.dotnet/dotnet" ]]; then
-  if [[ -x "${SWARM_ROOT}/launchtools/linux-dotnet-install.sh" ]]; then
+  if [[ -f "${SWARM_ROOT}/launchtools/linux-dotnet-install.sh" ]]; then
     log "ставим .NET SDK (скрипт SwarmUI)"
-    sudo -u "$SWARM_USER" bash "${SWARM_ROOT}/launchtools/linux-dotnet-install.sh" || true
+    # SwarmUI's linux-dotnet-install.sh does `cd launchtools` and
+    # `./launchtools/dotnet-install.sh` — must run from repo root.
+    if ! sudo -u "$SWARM_USER" bash -c "cd \"$SWARM_ROOT\" && bash launchtools/linux-dotnet-install.sh"; then
+      log "WARN: linux-dotnet-install.sh завершился с ошибкой"
+    fi
   fi
+  if [[ ! -x /usr/share/dotnet/dotnet && ! -x "/home/${SWARM_USER}/.dotnet/dotnet" ]]; then
+    log "ERROR: .NET не установлен ($HOME/.dotnet или /usr/share/dotnet) — SwarmUI не стартует"
+    exit 1
+  fi
+  log ".NET ok: $(sudo -u "$SWARM_USER" bash -lc 'command -v dotnet || echo /home/'"$SWARM_USER"'/.dotnet/dotnet')"
 fi
 
 mkdir -p \