timer works properly well

flake.nix

@@ -21,29 +21,37 @@
         gcc
         gnumake
         rustup
+        rust-analyzer
         cargo-espflash
         espup
 	mosquitto
       ];
 
 shellHook = ''
-  echo ">>> ESP32 DevShell (esp-hal only)"
+ echo ">>> ESP32 DevShell (esp-hal only)"
 
-  if [ ! -d "$HOME/.espup" ]; then
-    echo "Running espup install..."
-    espup install
-  fi
+ if [ ! -d "$HOME/.espup" ]; then
+   echo "Running espup install..."
+   espup install
+ fi
 
-  # Activate Xtensa Rust toolchain
-  export RUSTUP_TOOLCHAIN=esp
+  # Ensure the real rust-analyzer from Nix is used (not rustup's shim)
+  export PATH=${pkgs.rust-analyzer}/bin:$PATH
+
+  # Keep ESP toolchain binaries on PATH for building/flashing
+  # (do NOT set RUSTUP_TOOLCHAIN=esp globally; that breaks rust-analyzer)
   export PATH=$HOME/.rustup/toolchains/esp/bin:$PATH
+ 
+   # Add GCC/binutils path for xtensa-esp32-elf-gcc
+   export PATH=$HOME/.rustup/toolchains/esp/xtensa-esp-elf/esp-14.2.0_20240906/xtensa-esp-elf/bin:$PATH
+ 
+  # Helpers that force the ESP toolchain explicitly when needed
+  alias cargo-esp="RUSTUP_TOOLCHAIN=esp cargo"
+  alias rustc-esp="RUSTUP_TOOLCHAIN=esp rustc"
 
-  # Add GCC/binutils path for xtensa-esp32-elf-gcc
-  export PATH=$HOME/.rustup/toolchains/esp/xtensa-esp-elf/esp-14.2.0_20240906/xtensa-esp-elf/bin:$PATH
-
-  echo "Xtensa Rust toolchain ready."
-  rustc --version
-  which xtensa-esp32-elf-gcc || echo "⚠️ xtensa-esp32-elf-gcc not found in PATH"
+   echo "Xtensa Rust toolchain ready."
+   rustc --version
+   which xtensa-esp32-elf-gcc || echo "⚠️ xtensa-esp32-elf-gcc not found in PATH"
 '';
     };
   };