diff --git a/components/tracing_untrusted.gyp b/components/tracing_untrusted.gyp
index f2215de6a1b871..1991ec28a084c1 100644
--- a/components/tracing_untrusted.gyp
+++ b/components/tracing_untrusted.gyp
@@ -26,7 +26,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libtracing_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'sources': [
diff --git a/gpu/command_buffer/command_buffer_untrusted.gyp b/gpu/command_buffer/command_buffer_untrusted.gyp
index 8f27a0b0569957..0667fd859cfee0 100644
--- a/gpu/command_buffer/command_buffer_untrusted.gyp
+++ b/gpu/command_buffer/command_buffer_untrusted.gyp
@@ -21,7 +21,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libgles2_utils_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'dependencies': [
diff --git a/gpu/gpu_untrusted.gyp b/gpu/gpu_untrusted.gyp
index a1f755cc89b506..7974d12c5d7301 100644
--- a/gpu/gpu_untrusted.gyp
+++ b/gpu/gpu_untrusted.gyp
@@ -22,7 +22,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libgles2_implementation_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'defines': [
@@ -46,7 +46,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libcommand_buffer_common_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'includes': [
@@ -65,7 +65,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libgles2_cmd_helper_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'includes': [
@@ -84,7 +84,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libcommand_buffer_client_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'includes': [
@@ -103,7 +103,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libgpu_ipc_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'includes': [
diff --git a/ipc/ipc_untrusted.gyp b/ipc/ipc_untrusted.gyp
index a502548e87328a..7b0c5483faf856 100644
--- a/ipc/ipc_untrusted.gyp
+++ b/ipc/ipc_untrusted.gyp
@@ -21,7 +21,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libipc_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'dependencies': [
diff --git a/media/media_untrusted.gyp b/media/media_untrusted.gyp
index dade625c33f9f0..638d401c3baab6 100644
--- a/media/media_untrusted.gyp
+++ b/media/media_untrusted.gyp
@@ -19,7 +19,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libshared_memory_support_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'dependencies': [
diff --git a/ppapi/ppapi_ipc_untrusted.gyp b/ppapi/ppapi_ipc_untrusted.gyp
index 9b0b6785aac150..9e13867308b7de 100644
--- a/ppapi/ppapi_ipc_untrusted.gyp
+++ b/ppapi/ppapi_ipc_untrusted.gyp
@@ -22,7 +22,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libppapi_ipc_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'include_dirs': [
diff --git a/ppapi/ppapi_proxy_untrusted.gyp b/ppapi/ppapi_proxy_untrusted.gyp
index 727fbb5cf816a4..35dff872947a6f 100644
--- a/ppapi/ppapi_proxy_untrusted.gyp
+++ b/ppapi/ppapi_proxy_untrusted.gyp
@@ -21,7 +21,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libppapi_proxy_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'include_dirs': [
diff --git a/ppapi/ppapi_shared_untrusted.gyp b/ppapi/ppapi_shared_untrusted.gyp
index 4043c3a039fe34..453e711b06abf1 100644
--- a/ppapi/ppapi_shared_untrusted.gyp
+++ b/ppapi/ppapi_shared_untrusted.gyp
@@ -22,7 +22,7 @@
             'nacl_untrusted_build': 1,
             'nlib_target': 'libppapi_shared_untrusted.a',
             'build_glibc': 0,
-            'build_newlib': 1,
+            'build_newlib': 0,
             'build_irt': 1,
           },
           'include_dirs': [