From 04f99b927484f3f5e356cf6a00d65e68ce00938f Mon Sep 17 00:00:00 2001
From: Hans Ulrich Niedermann <hun@n-dimensional.de>
Date: Fri, 11 Nov 2022 13:25:32 +0100
Subject: [PATCH] shell/env fixes

---
 .github/workflows/matrix-test.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/matrix-test.yml b/.github/workflows/matrix-test.yml
index 9553cf4820..08ac4dc526 100644
--- a/.github/workflows/matrix-test.yml
+++ b/.github/workflows/matrix-test.yml
@@ -48,7 +48,7 @@ jobs:
 
       - name: 'Determine number of cores to build on (Windows)'
         if: runner.os == 'Windows'
-        run: echo NPROC=%NUMBER_OF_PROCESSORS% >> $GITHUB_ENV
+        run: echo NPROC="${NUMBER_OF_PROCESSORS-unknown}" >> $GITHUB_ENV
 
       - name: 'Determine number of cores to build on (macOS)'
         if: runner.os == 'macOS'