try this

.gitignore

@@ -5,16 +5,16 @@ yarn-error.log
 /cypress/screenshots/
 /__sapper__/
 
-/.svelte
-/build
-/functions
+/.svelte/
+/build/
+/functions/
+/static/build/
 
 #amplify
 amplify/\#current-cloud-backend
 amplify/.config/local-*
 amplify/backend/amplify-meta.json
 amplify/backend/awscloudformation
-build/
 dist/
 node_modules/
 aws-exports.js

package.json

@@ -12,7 +12,7 @@
     "test": "run-p --race dev cy:run",
     "lint": "prettier --check . && eslint --ignore-path .gitignore .",
     "format": "prettier --write .",
-    "svgstore": "svgstore -o src/svg/build/icons-sprite.svg src/svg/**.svg"
+    "svgstore": "svgstore -o static/build/icons-sprite.svg src/svg/**.svg"
   },
   "dependencies": {
     "classnames": "^2.3.1",

src/components/SvgIcon.svelte

@@ -1,5 +1,5 @@
 <script>
-  import svgSprite from '../svg/build/icons-sprite.svg'
+  import svgSprite from '../../static/build/icons-sprite.svg'
   export let className
   export let name
 </script>