tfs: fix npm distro install

build/tfs/darwin/build.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
-. build/tfs/common/common.sh
+. ./scripts/env.sh
+. ./build/tfs/common/common.sh
 
 export VSCODE_MIXIN_PASSWORD="$1"
 export AZURE_STORAGE_ACCESS_KEY="$2"
@@ -12,7 +13,7 @@ VSO_PAT="$6"
 echo "machine monacotools.visualstudio.com password $VSO_PAT" > ~/.netrc
 
 step "Install dependencies" \
-	./scripts/npm.sh install
+	npm install
 
 step "Mix in repository from vscode-distro" \
 	npm run gulp -- mixin

build/tfs/linux/build.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 
-. build/tfs/common/common.sh
+. ./scripts/env.sh
+. ./build/tfs/common/common.sh
 
 export ARCH="$1"
 export VSCODE_MIXIN_PASSWORD="$2"
@@ -14,7 +15,7 @@ VSO_PAT="$8"
 echo "machine monacotools.visualstudio.com password $VSO_PAT" > ~/.netrc
 
 step "Install dependencies" \
-	./scripts/npm.sh install --arch=$ARCH --unsafe-perm
+	npm install --arch=$ARCH --unsafe-perm
 
 step "Mix in repository from vscode-distro" \
 	npm run gulp -- mixin

scripts/env.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+export npm_config_disturl=https://atom.io/download/electron
+export npm_config_target=$(node -p "require('./package.json').version")
+export npm_config_runtime=electron
+export npm_config_cache="$HOME/.npm-electron"
+mkdir -p "$npm_config_cache"