#include "attr.h"
 #include "xdiff-interface.h"
 #include "run-command.h"
-#include "interpolate.h"
 #include "ll-merge.h"
 
 struct ll_merge_driver;
                        int virtual_ancestor)
 {
        char temp[3][50];
-       char cmdbuf[2048];
-       struct interp table[] = {
-               { "%O" },
-               { "%A" },
-               { "%B" },
+       struct strbuf cmd = STRBUF_INIT;
+       struct strbuf_expand_dict_entry dict[] = {
+               { "O", temp[0] },
+               { "A", temp[1] },
+               { "B", temp[2] },
+               { NULL }
        };
        struct child_process child;
        const char *args[20];
        create_temp(src1, temp[1]);
        create_temp(src2, temp[2]);
 
-       interp_set_entry(table, 0, temp[0]);
-       interp_set_entry(table, 1, temp[1]);
-       interp_set_entry(table, 2, temp[2]);
-
-       interpolate(cmdbuf, sizeof(cmdbuf), fn->cmdline, table, 3);
+       strbuf_expand(&cmd, fn->cmdline, strbuf_expand_dict_cb, &dict);
 
        memset(&child, 0, sizeof(child));
        child.argv = args;
        args[0] = "sh";
        args[1] = "-c";
-       args[2] = cmdbuf;
+       args[2] = cmd.buf;
        args[3] = NULL;
 
        status = run_command(&child);
  bad:
        for (i = 0; i < 3; i++)
                unlink(temp[i]);
+       strbuf_release(&cmd);
        return status;
 }