Rose does not build successfully

[yuki-was-taken]

On the latest commit, the build fails.
I didn't make any modifications to the makefile, and only bumped up the version of webkit2gtk to 4.1 and changed the gtk version to 3.

error:

rose-browser $ BUILDTYPE=RELEASE make
  CC  webview.o
  CC  search.o
  CC  client.o
  CC  path.o
  CC  keymap.o
  CC  rose.o
  CC  window.o
  CC  tab.o
  CC  debug.o
  CC  split.o
  CC  lua.o
/bin/sh: c: not found
/bin/sh: c: not found
make: [makefile:48: build/keymap.o] Error 127 (ignored)
make: [makefile:47: build/path.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/rose.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/webview.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/window.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/debug.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/search.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/client.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/tab.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/split.o] Error 127 (ignored)
/bin/sh: c: not found
make: [makefile:47: build/lua.o] Error 127 (ignored)
  LD  rose
/bin/sh: o: not found
make: [makefile:44: build/rose] Error 127 (ignored)