Turn off Windows build, tune the Linux build

.github/workflows/windows_conda_build.yml

@@ -1,10 +1,13 @@
 name: WindowsCondaBuild
 
+# Run this manually till it is figured out why it fails on push.
 on:
-  push:
-    branches: [ "master" ]
-  pull_request:
-    branches: [ "master" ]
+  workflow_dispatch:
+
+#  push:
+#    branches: [ "master" ]
+#  pull_request:
+#    branches: [ "master" ]
 
 # The windows build complains about the default PATH being too long. Trying to set
 # the path here, but whatever is being tried it fails. TBD.

recipe/build.sh

@@ -1,5 +1,9 @@
 #!/bin/bash
 
-qmake polyview.pro
+qmake                       \
+  QMAKE_CC=$CC_FOR_BUILD    \
+  QMAKE_CXX=$CXX_FOR_BUILD  \
+  QMAKE_LINK=$CXX_FOR_BUILD \
+  polyview.pro
 make -j${CPU_COUNT}
 make install INSTALL_ROOT=$PREFIX