diff --git a/.github/workflows/startos-iso.yaml b/.github/workflows/startos-iso.yaml
index 473294e22..2871b5fb1 100644
--- a/.github/workflows/startos-iso.yaml
+++ b/.github/workflows/startos-iso.yaml
@@ -8,7 +8,7 @@ on:
         type: choice
         description: Environment
         options:
-          - "<NONE>"
+          - NONE
           - dev
           - unstable
           - dev-unstable
@@ -18,6 +18,16 @@ on:
         options:
           - standard
           - fast
+      platform:
+        type: choice
+        description: Platform
+        options:
+          - ALL
+          - x86_64
+          - x86_64-nonfree
+          - aarch64
+          - aarch64-nonfree
+          - raspberrypi
   push:
     branches:
       - master
@@ -29,7 +39,7 @@ on:
 
 env:
   NODEJS_VERSION: "18.15.0"
-  ENVIRONMENT: '${{ fromJson(format(''["{0}", ""]'', github.event.inputs.environment || ''dev''))[github.event.inputs.environment == ''<NONE>''] }}'
+  ENVIRONMENT: '${{ fromJson(format(''["{0}", ""]'', github.event.inputs.environment || ''dev''))[github.event.inputs.environment == ''NONE''] }}'
 
 jobs:
   all:
@@ -37,27 +47,37 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        platform:
-          [x86_64, x86_64-nonfree, aarch64, aarch64-nonfree, raspberrypi]
+        platform: >-
+          ${{
+            fromJson(
+              format(
+                '[
+                  ["{0}"],
+                  ["x86_64", "x86_64-nonfree", "aarch64", "aarch64-nonfree", "raspberrypi"]
+                ]',
+                github.event.inputs.platform || 'ALL'
+              )
+            )[(github.event.inputs.platform || 'ALL') == 'ALL']
+          }}
     runs-on: >-
       ${{
         fromJson(
           format(
             '["ubuntu-22.04", "{0}"]',
             fromJson('{
-              "x86_64": "buildjet-32vcpu-ubuntu-2204",
-              "x86_64-nonfree": "buildjet-32vcpu-ubuntu-2204",
-              "aarch64": "buildjet-8vcpu-ubuntu-2204-arm",
-              "aarch64-nonfree": "buildjet-8vcpu-ubuntu-2204-arm",
-              "raspberrypi": "buildjet-16vcpu-ubuntu-2204-arm",
-            }')[matrix.platform]
+              "x86_64": ["buildjet-32vcpu-ubuntu-2204", "buildjet-32vcpu-ubuntu-2204"],
+              "x86_64-nonfree": ["buildjet-32vcpu-ubuntu-2204", "buildjet-32vcpu-ubuntu-2204"],
+              "aarch64": ["buildjet-8vcpu-ubuntu-2204-arm", "buildjet-32vcpu-ubuntu-2204-arm"],
+              "aarch64-nonfree": ["buildjet-8vcpu-ubuntu-2204-arm", "buildjet-32vcpu-ubuntu-2204-arm"],
+              "raspberrypi": ["buildjet-16vcpu-ubuntu-2204-arm", "buildjet-32vcpu-ubuntu-2204-arm"],
+            }')[matrix.platform][github.event.inputs.platform == matrix.platform]
           )
         )[github.event.inputs.runner == 'fast']
       }}
     steps:
       - run: |
           sudo mount -t tmpfs tmpfs .
-        if: ${{ github.event.inputs.runner == 'fast' && (matrix.platform == 'x86_64' || matrix.platform == 'x86_64-nonfree') }}
+        if: ${{ github.event.inputs.runner == 'fast' && (matrix.platform == 'x86_64' || matrix.platform == 'x86_64-nonfree' || github.event.inputs.platform == matrix.platform) }}
 
       - uses: actions/checkout@v3
         with: