diff --git a/.github/workflows/linux-build.yml b/.github/workflows/linux-build.yml
index 940830a..e5c41e9 100644
--- a/.github/workflows/linux-build.yml
+++ b/.github/workflows/linux-build.yml
@@ -35,7 +35,7 @@ jobs:
           sudo apt-get install tcl8.6-dev tcl-vfs
           mkdir "$HOME/install dir"
           echo "CFGOPT_COMMON=--with-tcl=/usr/lib/tcl8.6" >> $GITHUB_ENV
-          echo "CFGOPT_CUSTOM=\"$CONFIGURE\"" >> $GITHUB_ENV
+          echo "CFGOPT_CUSTOM=$CONFIGURE" >> $GITHUB_ENV
           echo "CC=$COMPILER" >> $GITHUB_ENV
         env:
           COMPILER: ${{ matrix.compiler }}