diff --git a/browser/config/mozconfigs/win32/mingwclang b/browser/config/mozconfigs/win32/mingwclang
--- a/browser/config/mozconfigs/win32/mingwclang
+++ b/browser/config/mozconfigs/win32/mingwclang
@@ -38,8 +38,6 @@
 HOST_CXX="$MOZ_FETCHES_DIR/clang/bin/clang++"
 CC="$MOZ_FETCHES_DIR/clang/bin/i686-w64-mingw32-clang"
 CXX="$MOZ_FETCHES_DIR/clang/bin/i686-w64-mingw32-clang++"
-ac_add_options --with-clang-path="$CC"
-ac_add_options --with-libclang-path="$MOZ_FETCHES_DIR/clang/lib"
 CXXFLAGS="-fms-extensions"
 CFLAGS="$CFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
 CXXFLAGS="$CXXFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
diff --git a/browser/config/mozconfigs/win64/mingwclang b/browser/config/mozconfigs/win64/mingwclang
--- a/browser/config/mozconfigs/win64/mingwclang
+++ b/browser/config/mozconfigs/win64/mingwclang
@@ -38,8 +38,6 @@
 HOST_CXX="$MOZ_FETCHES_DIR/clang/bin/clang++"
 CC="$MOZ_FETCHES_DIR/clang/bin/x86_64-w64-mingw32-clang"
 CXX="$MOZ_FETCHES_DIR/clang/bin/x86_64-w64-mingw32-clang++"
-ac_add_options --with-clang-path="$CC"
-ac_add_options --with-libclang-path="$MOZ_FETCHES_DIR/clang/lib"
 CXXFLAGS="-fms-extensions"
 CFLAGS="$CFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
 CXXFLAGS="$CXXFLAGS -fcrash-diagnostics-dir=${UPLOAD_PATH}"
diff --git a/build/unix/mozconfig.unix b/build/unix/mozconfig.unix
--- a/build/unix/mozconfig.unix
+++ b/build/unix/mozconfig.unix
@@ -7,7 +7,6 @@
     # We want to make sure we use binutils and other binaries in the tooltool
     # package.
     mk_add_options "export PATH=$MOZ_FETCHES_DIR/gcc/bin:$PATH"
-    ac_add_options --with-clang-path=$MOZ_FETCHES_DIR/clang/bin/clang
 else
     # For some builds we don't want to have Clang based static-analysis activated
     if [ -z "$DISABLE_CLANG_PLUGIN" ]; then
diff --git a/js/src/devtools/rootAnalysis/mozconfig.haz_shell b/js/src/devtools/rootAnalysis/mozconfig.haz_shell
--- a/js/src/devtools/rootAnalysis/mozconfig.haz_shell
+++ b/js/src/devtools/rootAnalysis/mozconfig.haz_shell
@@ -14,5 +14,4 @@
 
 if [ -n "$AUTOMATION" ]; then
   mk_add_options MOZ_OBJDIR="${HAZARD_SHELL_OBJDIR}"
-  ac_add_options --with-clang-path="${MOZ_FETCHES_DIR}/clang/bin/clang"
 fi
diff --git a/js/src/devtools/rootAnalysis/mozconfig.common b/js/src/devtools/rootAnalysis/mozconfig.common
--- a/js/src/devtools/rootAnalysis/mozconfig.common
+++ b/js/src/devtools/rootAnalysis/mozconfig.common
@@ -35,7 +35,3 @@
 CFLAGS="$CFLAGS $ANALYSIS_EXTRA_CFLAGS"
 CPPFLAGS="$CPPFLAGS $ANALYSIS_EXTRA_CFLAGS"
 CXXFLAGS="$CXXFLAGS $ANALYSIS_EXTRA_CFLAGS"
-
-if [ -n "$AUTOMATION" ]; then
-    ac_add_options --with-clang-path="${MOZ_FETCHES_DIR}/clang/bin/clang"
-fi