https://github.com/msharov/bsd-games/pull/12
--- a/configure
+++ b/configure
@@ -145,7 +145,7 @@ s/@builddir@/\$\{TMPDIR\}\/make/g"
 
 #### Find headers, libs, programs, and subs ##########################
 
-# Programs found using which
+# Programs found using command -v
 for i in $progs; do
     pname=$(expr $i : '\([^=]*\)')
     pcall=$(expr $i : '[^=]*=\([^=]*\)')
@@ -153,7 +153,7 @@ for i in $progs; do
     # First check if an environment variable is set
     [ -n "$ppath" ] && sub "s/@$pname@/$ppath/g"
     # Check if the program exists
-    ppath=$(which $pcall 2>/dev/null)
+    ppath=$(command -v $pcall 2>/dev/null)
     [ -n "$ppath" ] && [ -x "$ppath" ] && sub "s/@$pname@/$pcall/g"
 done
 # If nothing found in first loop, set the first pair anyway
@@ -164,7 +164,7 @@ for i in $progs; do
 done
 
 # Packages found using pkg-config
-pkgconfig=$(which pkg-config 2>/dev/null)
+pkgconfig=$(command -v pkg-config 2>/dev/null)
 if [ -n "$pkgconfig" ] && [ -x "$pkgconfig" ]; then
     faildeps=""
     for i in $pkgs; do