Revert "don't check Sys.getenv("MAKE") first (debugging GHA)"

This reverts commit 9c7603e.

Author: jgabry

R/utils.R

@@ -92,8 +92,11 @@ arch_is_aarch64 <- function() {
 }
 
 # Returns the type of make command to use to compile depending on the OS
+# First checks if $MAKE is set, otherwise falls back to system-specific default
 make_cmd <- function() {
-  if ((cmdstan_version() < "2.35.0") && os_is_windows() && !os_is_wsl() &&
+  if (Sys.getenv("MAKE") != "") {
+    Sys.getenv("MAKE")
+  } else if ((cmdstan_version() < "2.35.0") && os_is_windows() && !os_is_wsl() &&
       (Sys.getenv("CMDSTANR_USE_RTOOLS") == "")) {
     "mingw32-make.exe"
   } else {