diff --git a/configure.ac b/configure.ac
index 5747606b8..b49914343 100644
--- a/configure.ac
+++ b/configure.ac
@@ -268,9 +268,9 @@ AM_CONDITIONAL([OPENTHREAD_BUILD_OPTIMIZED], [test "${nl_cv_build_optimized}" =
 # Code style
 #
 
-AC_SUBST(ASTYLE, ["\${abs_top_srcdir}/.astyle/astyle-wrap.sh"])
-AC_SUBST(ASTYLE_PRETTY_ARGS, ["astyle --options=\${abs_top_builddir}/.astyle/astyle-opts"])
-AC_SUBST(ASTYLE_PRETTY_CHECK_ARGS, ["astyle --options=\${abs_top_builddir}/.astyle/astyle-opts --dry-run"])
+AC_SUBST(PRETTY, ["\${abs_top_srcdir}/.astyle/astyle-wrap.sh"])
+AC_SUBST(PRETTY_ARGS, ["astyle --options=\${abs_top_builddir}/.astyle/astyle-opts"])
+AC_SUBST(PRETTY_CHECK_ARGS, ["astyle --options=\${abs_top_builddir}/.astyle/astyle-opts --dry-run"])
 
 #
 # Tests
@@ -592,9 +592,9 @@ AC_MSG_NOTICE([
   C++ Compile flags                         : ${CXXFLAGS:--}
   Link flags                                : ${LDFLAGS:--}
   Link libraries                            : ${LIBS}
-  Astyle                                    : ${ASTYLE}
-  Astyle pretty args                        : ${ASTYLE_PRETTY_ARGS}
-  Astyle pretty check args                  : ${ASTYLE_PRETTY_CHECK_ARGS}
+  Astyle                                    : ${PRETTY}
+  Astyle pretty args                        : ${PRETTY_ARGS}
+  Astyle pretty check args                  : ${PRETTY_CHECK_ARGS}
   OpenThread CLI support                    : ${enable_cli}
   OpenThread NCP support                    : ${enable_ncp}
   OpenThread examples                       : ${OPENTHREAD_EXAMPLES}
diff --git a/third_party/nlbuild-autotools/repo/autoconf/m4/nl_enable_coverage.m4 b/third_party/nlbuild-autotools/repo/autoconf/m4/nl_enable_coverage.m4
index 1d064e441..ec7859c48 100644
--- a/third_party/nlbuild-autotools/repo/autoconf/m4/nl_enable_coverage.m4
+++ b/third_party/nlbuild-autotools/repo/autoconf/m4/nl_enable_coverage.m4
@@ -86,6 +86,7 @@ AC_DEFUN([NL_ENABLE_COVERAGE],
                 ])
 
             if test "${nl_cv_build_coverage}" = "yes"; then         
+                AM_EXTRA_RECURSIVE_TARGETS([coverage])
                 if test "${GCC}" != "yes"; then
                     AC_MSG_ERROR([GCC or a GCC-compatible toolchain is required for --enable-coverage])
 
diff --git a/third_party/nlbuild-autotools/repo/automake/post/rules/coverage.am b/third_party/nlbuild-autotools/repo/automake/post/rules/coverage.am
index 787473ab0..dbe185ba3 100644
--- a/third_party/nlbuild-autotools/repo/automake/post/rules/coverage.am
+++ b/third_party/nlbuild-autotools/repo/automake/post/rules/coverage.am
@@ -20,20 +20,13 @@
 #      targets and rules.
 #
 #      This represents the minimum integration with GNU autotools
-#      (automake inparticular) such that 'make coverage' may be invoked
+#      (automake in particular) such that 'make coverage' may be invoked
 #      at the top of the tree and all the prerequisites occur such
 #      that it executes successfully with no intervening make target
 #      invocations. The 'check-am' and '$(BUILT_SOURCES)' are the key
 #      automake-specific dependencies to ensure that happens.
 #
 
-.PHONY: coverage coverage-recursive
+coverage-local: check-am
 
-coverage: coverage-recursive
-
-coverage: check-am
-
-coverage: $(BUILT_SOURCES)
-
-coverage-recursive:
-	$(nl-make-subdirs)
+coverage-local: $(BUILT_SOURCES)
diff --git a/third_party/nlbuild-autotools/repo/automake/post/rules/pretty.am b/third_party/nlbuild-autotools/repo/automake/post/rules/pretty.am
index 2743bf286..ad0ce7f0e 100644
--- a/third_party/nlbuild-autotools/repo/automake/post/rules/pretty.am
+++ b/third_party/nlbuild-autotools/repo/automake/post/rules/pretty.am
@@ -16,40 +16,62 @@
 
 #
 #    Description:
-#      This file is the automake footer for code style checking and
-#      reformatting related targets and rules.
+#      This file is the automake footer for all coding style-related
+#      targets and rules.
 #
+#      The recursive target 'pretty', invoked against '$(PRETTY_SUBDIRS)', 
+#      is intended to reformat a collection of source files, defined by 
+#      '$(PRETTY_FILES)' using the program '$(PRETTY)' with the arguments 
+#      '$(PRETTY_ARGS)'.
+#
+#      The recursive target 'pretty-check' (and its alias 'lint'),
+#      invoked against '$(PRETTY_SUBDIRS)', is intended to only check 
+#      but NOT reformat a collection of source files, defined by
+#      '$(PRETTY_FILES)' using the program '$(PRETTY_CHECK)' with the
+#      arguments '$(PRETTY_CHECK_ARGS)'.
+#
+#      This represents the minimum integration with GNU autotools
+#      (automake inparticular) such that 'make pretty' and 'make
+#      pretty-check' may be invoked at the top of the tree and all 
+#      the prerequisites occur such that it executes successfully 
+#      with no intervening make target invocations. '$(BUILT_SOURCES)' 
+#      are the key automake-specific dependencies to ensure that happens.
+#
+
+# nl-make-pretty <TERSE OUTPUT COMMAND> <COMMAND> <COMMAND ARGUMENTS>
+#
+# This function iterates over PRETTY_FILES, invoking COMMAND with
+# COMMAND ARGUEMENTS on each file. If a non-verbose make has been
+# requested TERSE OUTPUT COMMAND is emitted to standard output.
+
+define nl-make-pretty
+$(AM_V_at)for file in $(PRETTY_FILES); do \
+    $(1) \
+    if test -f $${file}; then d=.; else d=$(srcdir); fi; \
+    $(2) $(3) $${d}/$${file} \
+    || exit 1; \
+done
+endef
+
+.PHONY: pretty pretty-recursive pretty-check pretty-check-recursive lint
 
 pretty: pretty-recursive
 
-#
-# 'pretty' target calls astyle on each file in SOURCES and HEADERS.
-# This iteratively calls astyle on each file.  astyle seems to retain
-# state from processing a previous file, which sometimes causes
-# formatting of a subsequent file to fail.
-#
-pretty:
-ifneq ($(SOURCES) $(HEADERS),)
-	$(AM_V_at) for file in $(SOURCES) $(HEADERS); do $(ASTYLE) $(ASTYLE_PRETTY_ARGS) $$file; done
-endif
+pretty pretty-check: $(BUILT_SOURCES)
 
-pretty-check: pretty-recursive
+lint: pretty-check
 
-#
-# 'pretty-check' target calls astyle on each file in SOURCES and HEADERS.
-# This iteratively calls astyle on each file.  astyle seems to retain
-# state from processing a previous file, which sometimes causes
-# formatting of a subsequent file to fail.
-#
-pretty-check:
-ifneq ($(SOURCES) $(HEADERS),)
-	$(AM_V_at)for file in $(SOURCES) $(HEADERS); do \
-		if [[ -n `$(ASTYLE) $(ASTYLE_PRETTY_CHECK_ARGS) $$file` ]]; then \
-			echo "Code style error.  Run 'make pretty' to reformat."; \
-			exit 1; \
-		fi \
-	done
-endif
+pretty-check: pretty-check-recursive
 
-pretty-recursive:
+pretty-recursive pretty-check-recursive:
 	$(call nl-make-subdirs-with-dirs,$(PRETTY_SUBDIRS))
+
+pretty:
+ifneq ($(PRETTY),)
+	$(call nl-make-pretty,$(AM_V_PRETTY),$(PRETTY),$(PRETTY_ARGS))
+endif
+
+pretty-check:
+ifneq ($(PRETTY_CHECK),)
+	$(call nl-make-pretty,$(AM_V_PRETTY_CHECK),$(PRETTY_CHECK),$(PRETTY_CHECK_ARGS))
+endif
diff --git a/third_party/nlbuild-autotools/repo/automake/pre/macros.am b/third_party/nlbuild-autotools/repo/automake/pre/macros.am
index 377964fde..8122beab8 100644
--- a/third_party/nlbuild-autotools/repo/automake/pre/macros.am
+++ b/third_party/nlbuild-autotools/repo/automake/pre/macros.am
@@ -22,6 +22,7 @@
 
 include $(abs_top_nlbuild_autotools_dir)/automake/pre/macros/constants.am
 include $(abs_top_nlbuild_autotools_dir)/automake/pre/macros/paths.am
+include $(abs_top_nlbuild_autotools_dir)/automake/pre/macros/pretty.am
 include $(abs_top_nlbuild_autotools_dir)/automake/pre/macros/verbosity.am
 include $(abs_top_nlbuild_autotools_dir)/automake/pre/macros/coverage.am
 include $(abs_top_nlbuild_autotools_dir)/automake/pre/macros/subdirs.am
diff --git a/third_party/nlbuild-autotools/repo/automake/pre/macros/pretty.am b/third_party/nlbuild-autotools/repo/automake/pre/macros/pretty.am
new file mode 100644
index 000000000..a983c2973
--- /dev/null
+++ b/third_party/nlbuild-autotools/repo/automake/pre/macros/pretty.am
@@ -0,0 +1,52 @@
+#
+#    Copyright 2016 Nest Labs Inc. All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+
+#
+#    Description:
+#      This file defines automake variables for performing coding
+#      style formatting and checking.
+#
+
+AM_V_PRETTY          = $(am__v_PRETTY_$(V))
+am__v_PRETTY_        = $(am__v_PRETTY_$(AM_DEFAULT_VERBOSITY))
+am__v_PRETTY_0       = echo "  PRETTY   $${file}";
+am__v_PRETTY_1       = 
+
+AM_V_PRETTY_CHECK    = $(am__v_PRETTY_CHECK_$(V))
+am__v_PRETTY_CHECK_  = $(am__v_PRETTY_CHECK_$(AM_DEFAULT_VERBOSITY))
+am__v_PRETTY_CHECK_0 = echo "  PRETTY   $${file}";
+am__v_PRETTY_CHECK_1 = 
+
+# PRETTY_FILES
+#
+# This defines the collection of files against which the PRETTY and
+# PRETTY_CHECK profiles will be invoked for the 'pretty' and
+# 'pretty-check' targets, respectively.
+#
+# This defaults to SOURCES and HEADERS and may be overriden or
+# appended to.
+
+PRETTY_FILES    ?= $(SOURCES) $(HEADERS)
+
+# PRETTY_SUBDIRS
+#
+# This defines the subdirectories for which the recursive 'pretty' and
+# 'pretty-check' targets will run against.
+#
+# This defaults to SUBDIRS and may be overridden or appended to.
+
+PRETTY_SUBDIRS  ?= $(SUBDIRS)
+
diff --git a/third_party/nlbuild-autotools/repo/automake/pre/macros/subdirs.am b/third_party/nlbuild-autotools/repo/automake/pre/macros/subdirs.am
index 7a0b5b54a..174cefefd 100644
--- a/third_party/nlbuild-autotools/repo/automake/pre/macros/subdirs.am
+++ b/third_party/nlbuild-autotools/repo/automake/pre/macros/subdirs.am
@@ -34,7 +34,7 @@
 #                   attempt to make in each specified subdirectory.
 #
 define nl-make-subdirs-with-dirs-and-goals
-$(AM_V_at)for subdir in $(1); do \
++$(AM_V_at)for subdir in $(1); do \
     echo "Making $(2) in $${subdir}"; \
     $(MAKE) -C "$${subdir}" $(AM_MAKEFLAGS) $(2) \
     || exit 1; \
diff --git a/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so b/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so
deleted file mode 100755
index 3ef80f635..000000000
Binary files a/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so and /dev/null differ
diff --git a/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so b/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so
new file mode 120000
index 000000000..2fac5cb73
--- /dev/null
+++ b/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so
@@ -0,0 +1 @@
+libltdl.so.7.3.0
\ No newline at end of file
diff --git a/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so.7 b/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so.7
deleted file mode 100755
index 3ef80f635..000000000
Binary files a/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so.7 and /dev/null differ
diff --git a/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so.7 b/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so.7
new file mode 120000
index 000000000..2fac5cb73
--- /dev/null
+++ b/third_party/nlbuild-autotools/repo/tools/host/i686-pc-linux-gnu/lib/libltdl.so.7
@@ -0,0 +1 @@
+libltdl.so.7.3.0
\ No newline at end of file
diff --git a/third_party/nlbuild-autotools/repo/tools/host/x86_64-apple-darwin/lib/libltdl.dylib b/third_party/nlbuild-autotools/repo/tools/host/x86_64-apple-darwin/lib/libltdl.dylib
deleted file mode 100755
index 1f5d1340e..000000000
Binary files a/third_party/nlbuild-autotools/repo/tools/host/x86_64-apple-darwin/lib/libltdl.dylib and /dev/null differ
diff --git a/third_party/nlbuild-autotools/repo/tools/host/x86_64-apple-darwin/lib/libltdl.dylib b/third_party/nlbuild-autotools/repo/tools/host/x86_64-apple-darwin/lib/libltdl.dylib
new file mode 120000
index 000000000..7836ab48c
--- /dev/null
+++ b/third_party/nlbuild-autotools/repo/tools/host/x86_64-apple-darwin/lib/libltdl.dylib
@@ -0,0 +1 @@
+libltdl.7.dylib
\ No newline at end of file
diff --git a/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so b/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so
deleted file mode 100755
index ef8375a68..000000000
Binary files a/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so and /dev/null differ
diff --git a/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so b/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so
new file mode 120000
index 000000000..2fac5cb73
--- /dev/null
+++ b/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so
@@ -0,0 +1 @@
+libltdl.so.7.3.0
\ No newline at end of file
diff --git a/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so.7 b/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so.7
deleted file mode 100755
index ef8375a68..000000000
Binary files a/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so.7 and /dev/null differ
diff --git a/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so.7 b/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so.7
new file mode 120000
index 000000000..2fac5cb73
--- /dev/null
+++ b/third_party/nlbuild-autotools/repo/tools/host/x86_64-unknown-linux-gnu/lib/libltdl.so.7
@@ -0,0 +1 @@
+libltdl.so.7.3.0
\ No newline at end of file