boolector: patch usage of ar and ranlib for cross

eep.

pkgs/applications/science/logic/boolector/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl, writeShellScriptBin }:
 
 stdenv.mkDerivation rec {
   name    = "boolector-${version}";
@@ -8,8 +8,22 @@ stdenv.mkDerivation rec {
     sha256 = "0mdf7hwix237pvknvrpazcx6s3ininj5k7vhysqjqgxa7lxgq045";
   };
 
-  prePatch = ''
+  prePatch =
-    sed -i -e 's@mv lingeling\* lingeling@\0 \&\& sed -i -e "1i#include <stdint.h>" lingeling/lglib.h@' makefile
+    let
+      lingelingPatch = writeShellScriptBin "lingeling-patch" ''
+        sed -i -e "1i#include <stdint.h>" lingeling/lglib.h
+
+        ${crossFix}/bin/crossFix lingeling
+      '';
+      crossFix = writeShellScriptBin "crossFix" ''
+        # substituteInPlace not available here
+        sed -i $1/makefile.in \
+          -e 's@ar rc@$(AR) rc@' \
+          -e 's@ranlib@$(RANLIB)@'
+      '';
+    in ''
+    sed -i -e 's@mv lingeling\* lingeling@\0 \&\& ${lingelingPatch}/bin/lingeling-patch@' makefile
+    sed -i -e 's@mv boolector\* boolector@\0 \&\& ${crossFix}/bin/crossFix boolector@' makefile
   '';
 
   installPhase = ''