8 files changed, 16 insertions, 23 deletions
diff --git a/gfx/angle/moz.build b/gfx/angle/moz.build
index ea4be831bd..ee870a088e 100644
--- a/gfx/angle/moz.build
+++ b/gfx/angle/moz.build
@@ -4,7 +4,10 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-DIRS += ["targets/translator"]
+DIRS += [
+    "targets/angle_common",
+    "targets/translator",
+]
 
 # Only build libEGL/libGLESv2 on Windows
 if CONFIG["MOZ_WIDGET_TOOLKIT"] == "windows":
diff --git a/gfx/angle/targets/angle_gpu_info_util/moz.build b/gfx/angle/targets/angle_gpu_info_util/moz.build
index f2fe1dd3d4..7278d2bfcd 100644
--- a/gfx/angle/targets/angle_gpu_info_util/moz.build
+++ b/gfx/angle/targets/angle_gpu_info_util/moz.build
@@ -170,10 +170,6 @@ USE_LIBS += [
     "angle_common",
 ]
 
-DIRS += [
-    "../angle_common",
-]
-
 OS_LIBS += [
     "dxgi",
     "setupapi",
diff --git a/gfx/angle/targets/angle_image_util/moz.build b/gfx/angle/targets/angle_image_util/moz.build
index 8a17982e17..38871adc6e 100644
--- a/gfx/angle/targets/angle_image_util/moz.build
+++ b/gfx/angle/targets/angle_image_util/moz.build
@@ -150,10 +150,6 @@ USE_LIBS += [
     "angle_common",
 ]
 
-DIRS += [
-    "../angle_common",
-]
-
 # LDFLAGS += [
 #     "--color-diagnostics",
 #     "/call-graph-profile-sort:no",
diff --git a/gfx/angle/targets/libEGL/moz.build b/gfx/angle/targets/libEGL/moz.build
index 9327db4c23..eb8c049493 100644
--- a/gfx/angle/targets/libEGL/moz.build
+++ b/gfx/angle/targets/libEGL/moz.build
@@ -157,11 +157,6 @@ USE_LIBS += [
     "libGLESv2",
 ]
 
-DIRS += [
-    "../angle_common",
-    "../libGLESv2",
-]
-
 OS_LIBS += [
     "advapi32",
     "comdlg32",
diff --git a/gfx/angle/targets/libGLESv2/moz.build b/gfx/angle/targets/libGLESv2/moz.build
index dfcf0df719..18d296d084 100644
--- a/gfx/angle/targets/libGLESv2/moz.build
+++ b/gfx/angle/targets/libGLESv2/moz.build
@@ -366,11 +366,9 @@ USE_LIBS += [
 ]
 
 DIRS += [
-    "../angle_common",
     "../angle_gpu_info_util",
     "../angle_image_util",
     "../compression_utils_portable",
-    "../translator",
 ]
 
 OS_LIBS += [
diff --git a/gfx/angle/targets/preprocessor/moz.build b/gfx/angle/targets/preprocessor/moz.build
index 3fbce2e0c4..c790132062 100644
--- a/gfx/angle/targets/preprocessor/moz.build
+++ b/gfx/angle/targets/preprocessor/moz.build
@@ -156,10 +156,6 @@ USE_LIBS += [
     "angle_common",
 ]
 
-DIRS += [
-    "../angle_common",
-]
-
 # LDFLAGS += [
 #     "--color-diagnostics",
 #     "/call-graph-profile-sort:no",
diff --git a/gfx/angle/targets/translator/moz.build b/gfx/angle/targets/translator/moz.build
index 38dbb74f79..4b59b82403 100644
--- a/gfx/angle/targets/translator/moz.build
+++ b/gfx/angle/targets/translator/moz.build
@@ -298,7 +298,6 @@ USE_LIBS += [
 ]
 
 DIRS += [
-    "../angle_common",
     "../preprocessor",
 ]
 
diff --git a/gfx/angle/update-angle.py b/gfx/angle/update-angle.py
index 348a1cf745..99d65f84f6 100755
--- a/gfx/angle/update-angle.py
+++ b/gfx/angle/update-angle.py
@@ -5,7 +5,7 @@
 
 assert __name__ == "__main__"
 
-"""
+r"""
 To update ANGLE in Gecko, use Windows with git-bash, and setup depot_tools, python2, and
 python3. Because depot_tools expects `python` to be `python2` (shame!), python2 must come
 before python3 in your path.
@@ -502,8 +502,18 @@ def export_target(target_full_name) -> Set[str]:
     dep_dirs = set(dep_libs)
     dep_dirs.discard("zlib")
 
+    # Those directories are added by gfx/angle/moz.build.
+    already_added_dirs = [
+        "angle_common",
+        "translator",
+        "libEGL",
+        "libGLESv2",
+    ]
+
     append_arr(lines, "USE_LIBS", dep_libs)
-    append_arr(lines, "DIRS", ["../" + x for x in dep_dirs])
+    append_arr(
+        lines, "DIRS", ["../" + x for x in dep_dirs if x not in already_added_dirs]
+    )
     append_arr(lines, "OS_LIBS", os_libs)
     append_arr_commented(lines, "LDFLAGS", ldflags)