diff --git a/build-compiler-rt.sh b/build-compiler-rt.sh
index fc589c5..bbcb4ec 100755
--- a/build-compiler-rt.sh
+++ b/build-compiler-rt.sh
@@ -96,6 +96,7 @@ for arch in $ARCHS; do
     [ -z "$CLEAN" ] || rm -rf build-$arch$BUILD_SUFFIX
     mkdir -p build-$arch$BUILD_SUFFIX
     cd build-$arch$BUILD_SUFFIX
+    [ -n "$NO_RECONF" ] || rm -rf CMake*
     cmake \
         ${CMAKE_GENERATOR+-G} "$CMAKE_GENERATOR" \
         -DCMAKE_BUILD_TYPE=Release \
diff --git a/build-libcxx.sh b/build-libcxx.sh
index 6b18d97..be0a8bc 100755
--- a/build-libcxx.sh
+++ b/build-libcxx.sh
@@ -83,6 +83,7 @@ for arch in $ARCHS; do
     [ -z "$CLEAN" ] || rm -rf build-$arch
     mkdir -p build-$arch
     cd build-$arch
+    [ -n "$NO_RECONF" ] || rm -rf CMake*
     cmake \
         ${CMAKE_GENERATOR+-G} "$CMAKE_GENERATOR" \
         -DCMAKE_BUILD_TYPE=Release \
diff --git a/build-lldb-mi.sh b/build-lldb-mi.sh
index d154902..85e0a49 100755
--- a/build-lldb-mi.sh
+++ b/build-lldb-mi.sh
@@ -112,6 +112,7 @@ cd lldb-mi
 [ -z "$CLEAN" ] || rm -rf $BUILDDIR
 mkdir -p $BUILDDIR
 cd $BUILDDIR
+[ -n "$NO_RECONF" ] || rm -rf CMake*
 cmake \
     ${CMAKE_GENERATOR+-G} "$CMAKE_GENERATOR" \
     -DCMAKE_INSTALL_PREFIX="$PREFIX" \
diff --git a/build-llvm.sh b/build-llvm.sh
index c173ff9..e285046 100755
--- a/build-llvm.sh
+++ b/build-llvm.sh
@@ -292,6 +292,7 @@ fi
 [ -z "$CLEAN" ] || rm -rf $BUILDDIR
 mkdir -p $BUILDDIR
 cd $BUILDDIR
+[ -n "$NO_RECONF" ] || rm -rf CMake*
 # Building LLDB for macOS fails unless building libc++ is enabled at the
 # same time, or unless the LLDB tests are disabled.
 cmake \
diff --git a/build-openmp.sh b/build-openmp.sh
index 4ba41b0..ee6f1a5 100755
--- a/build-openmp.sh
+++ b/build-openmp.sh
@@ -86,6 +86,7 @@ for arch in $ARCHS; do
     [ -z "$CLEAN" ] || rm -rf build-$arch
     mkdir -p build-$arch
     cd build-$arch
+    [ -n "$NO_RECONF" ] || rm -rf CMake*
 
     cmake \
         ${CMAKE_GENERATOR+-G} "$CMAKE_GENERATOR" \