try to fix powershell quoting

appveyor.yml

@@ -4,6 +4,23 @@ environment:
   node_pre_gyp_secretAccessKey:
     secure: 1amwJJw9fu0j6dXnc5KsAQbSYf7Cjw/dapT6OZWABa6nc52grkKeLQ+DGaOfQz8i
   matrix:
+    # custom visual studio 2014 builds
+    - nodejs_version: 0.10.33
+      platform: x64
+      msvs_toolset: 14
+      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
+    - nodejs_version: 0.11.14
+      platform: x64
+      msvs_toolset: 14
+      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
+    - nodejs_version: 0.10.33
+      platform: x86
+      msvs_toolset: 14
+      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
+    - nodejs_version: 0.11.14
+      platform: x86
+      msvs_toolset: 14
+      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
     - nodejs_version: 0.10.32
       nw_version: 0.8.6
       platform: x86
@@ -30,23 +47,6 @@ environment:
       platform: x64
       msvs_toolset: 12
       BUILD_ARGS: --target=0.11.14
-    # custom visual studio 2014 builds
-    - nodejs_version: 0.10.33
-      platform: x64
-      msvs_toolset: 14
-      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
-    - nodejs_version: 0.11.14
-      platform: x64
-      msvs_toolset: 14
-      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
-    - nodejs_version: 0.10.33
-      platform: x86
-      msvs_toolset: 14
-      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
-    - nodejs_version: 0.11.14
-      platform: x86
-      msvs_toolset: 14
-      BUILD_ARGS: --dist-url=https://s3.amazonaws.com/mapbox/node-cpp11 --toolset=v140
 
 os: Visual Studio 2014 CTP4
 
@@ -58,7 +58,7 @@ install:
   # use 64 bit python if platform is 64 bit
   - if "%platform%" == "x64" set PATH=C:\Python27-x64;%PATH%
   - SET ARCHPATH=
-  - if %platform% == x64 (SET ARCHPATH="x64/")
+  - if %platform% == x64 (SET ARCHPATH=x64/)
   # install node version per visual studio toolset
   - if "%msvs_toolset%" == "12" powershell Install-Product node $env:nodejs_version $env:platform
   - if "%msvs_toolset%" == "14" powershell Write-Output "fetching https://mapbox.s3.amazonaws.com/node-cpp11/v$env:nodejs_version/${env:ARCHPATH}node.exe"