diff --git a/package.json b/package.json
index 8fd147e..7e38caf 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,10 @@
     "test": "npm run test:electron",
     "build:dev": "./scripts/build dev",
     "build:min": "./scripts/build min",
-    "prepublish": "npm run build:dev && npm run build:min"
+    "prepublish": "npm run build:dev && npm run build:min",
+    "instrument:discify": "./scripts/instrument discify",
+    "instrument:minified": "./scripts/instrument minified",
+    "instrument:gzip": "./scripts/instrument gzip"
   },
   "repository": "yoshuawuyts/choo",
   "keywords": [
diff --git a/scripts/instrument b/scripts/instrument
index ced46c4..eb077f8 100755
--- a/scripts/instrument
+++ b/scripts/instrument
@@ -1,13 +1,5 @@
 #!/bin/sh
 
-dirname=$(dirname "$(readlink -f "$0")")
-
-browserify="$dirname/../node_modules/.bin/browserify"
-uglify="$dirname/../node_modules/.bin/uglifyjs"
-pretty_bytes="$dirname/../node_modules/.bin/pretty-bytes"
-gzip_size="$dirname/../node_modules/.bin/gzip-size"
-discify="$dirname/../node_modules/.bin/discify"
-
 usage () {
 cat << USAGE
 script/test-size
@@ -24,45 +16,45 @@ gzip () {
   if [ $? -eq 0 ]; then
     zopfli "$1" -i1000 -c | wc -c
   else
-    "$gzip_size" < "$1"
+    gzip-size < "$1"
   fi
 }
 
 gzip_size () {
   mkdir -p tmp/
-  "$browserify" index.js \
+  browserify index.js \
     -g unassertify \
     -g yo-yoify \
     -g es2020 \
     -g uglifyify \
     -p bundle-collapser/plugin \
-    | "$uglify" \
+    | uglifyjs \
     > tmp/bundle.min.js
 
-    gzip tmp/bundle.min.js | "$pretty_bytes"
+    gzip tmp/bundle.min.js | pretty-bytes
     rm -rf tmp/
 }
 
 min_size () {
-  "$browserify" index.js \
+  browserify index.js \
     -g unassertify \
     -g yo-yoify \
     -g es2020 \
     -g uglifyify \
     -p bundle-collapser/plugin \
-    | "$uglify" \
+    | uglifyjs \
     | wc -c \
-    | "$pretty_bytes"
+    | pretty-bytes
 }
 
 run_discify () {
-  "$browserify" index.js --full-paths \
+  browserify index.js --full-paths \
     -g unassertify \
     -g yo-yoify \
     -g es2020 \
     -g uglifyify \
-    | "$uglify" \
-    | "$discify" --open
+    | uglifyjs \
+    | discify --open
 }
 
 # set CLI flags