diff --git a/home-manager/services/dotfiles-updater/update.sh b/home-manager/services/dotfiles-updater/update.sh
index d2d4705c4..38042f8e7 100755
--- a/home-manager/services/dotfiles-updater/update.sh
+++ b/home-manager/services/dotfiles-updater/update.sh
@@ -10,8 +10,24 @@ if [ "$(git rev-parse --abbrev-ref HEAD)" != "main" ]; then
   exit 0
 fi
 
-# Fetch and pull latest changes
+# Store current commit hash before fetching
+CURRENT_COMMIT=$(git rev-parse HEAD)
+
+# Fetch latest changes
 git fetch origin main
+
+# Get the latest remote commit
+REMOTE_COMMIT=$(git rev-parse origin/main)
+
+# Check if there are any changes
+if [ "$CURRENT_COMMIT" = "$REMOTE_COMMIT" ]; then
+  echo "No changes detected (current: ${CURRENT_COMMIT:0:8}). Skipping build and switch."
+  exit 0
+fi
+
+echo "Changes detected: ${CURRENT_COMMIT:0:8} -> ${REMOTE_COMMIT:0:8}"
+
+# Reset to latest
 git reset --hard origin/main
 
 # Run the install script
diff --git a/spec/dotfiles_updater_spec.sh b/spec/dotfiles_updater_spec.sh
index 27353836c..2f3d6eddc 100644
--- a/spec/dotfiles_updater_spec.sh
+++ b/spec/dotfiles_updater_spec.sh
@@ -50,6 +50,36 @@ The output should include 'git reset --hard origin/main'
 End
 End
 
+Describe 'change detection'
+It 'stores current commit before fetching'
+When run bash -c "grep 'CURRENT_COMMIT=\$(git rev-parse HEAD)' '$SCRIPT'"
+# shellcheck disable=SC2016
+The output should include 'CURRENT_COMMIT=$(git rev-parse HEAD)'
+End
+
+It 'gets remote commit after fetching'
+When run bash -c "grep 'REMOTE_COMMIT=\$(git rev-parse origin/main)' '$SCRIPT'"
+# shellcheck disable=SC2016
+The output should include 'REMOTE_COMMIT=$(git rev-parse origin/main)'
+End
+
+It 'compares commits to detect changes'
+When run bash -c "grep 'CURRENT_COMMIT.*=.*REMOTE_COMMIT' '$SCRIPT'"
+The output should include 'CURRENT_COMMIT'
+The output should include 'REMOTE_COMMIT'
+End
+
+It 'skips build when no changes detected'
+When run bash -c "grep 'No changes detected' '$SCRIPT'"
+The output should include 'No changes detected'
+End
+
+It 'logs when changes are detected'
+When run bash -c "grep 'Changes detected' '$SCRIPT'"
+The output should include 'Changes detected'
+End
+End
+
 Describe 'installation'
 It 'runs install.sh after update'
 When run bash -c "grep './install.sh' '$SCRIPT'"