diff --git a/platforms/osx-64/SCsub b/platforms/osx-64/SCsub
index 1b8866e6..449add89 100644
--- a/platforms/osx-64/SCsub
+++ b/platforms/osx-64/SCsub
@@ -71,9 +71,10 @@ if env["backend"] == "cpython":
             "1>/dev/null make install && "
             + "LD_LIBRARY_PATH=${TARGET.get_abspath()}/lib ${TARGET.get_abspath()}/bin/pip3 install cffi",
             Chmod("%s/lib/libpython3.6m.dylib" % cpython_build.abspath, 0o600),
-            "install_name_tool -id @loader_path/lib/libpython3.6m.dylib " +
-            "%s/lib/libpython3.6m.dylib" % cpython_build.abspath
-        ]
+            "install_name_tool -id @loader_path/lib/libpython3.6m.dylib "
+            + "%s/lib/libpython3.6m.dylib"
+            % cpython_build.abspath,
+        ],
     )
     env.NoClean(cpython_build)
 
@@ -159,9 +160,10 @@ else:  # pypy
         PYPY_SRC_ARCHIVE,
         [
             "tar xf ${SOURCE} -C ${TARGET.srcdir}",
-            "install_name_tool -id @loader_path/bin/libpypy3-c.dylib " +
-            "%s/bin/libpypy3-c.dylib" % pypy_build.abspath
-        ]
+            "install_name_tool -id @loader_path/bin/libpypy3-c.dylib "
+            + "%s/bin/libpypy3-c.dylib"
+            % pypy_build.abspath,
+        ],
     )
 
     def generate_build_dir(target, source, env):