diff --git a/build-compiler-rt.sh b/build-compiler-rt.sh
index 277f1f0..5439e39 100755
--- a/build-compiler-rt.sh
+++ b/build-compiler-rt.sh
@@ -68,7 +68,6 @@ fi
 
 if command -v ninja >/dev/null; then
     CMAKE_GENERATOR="Ninja"
-    NINJA=1
     BUILDCMD=ninja
 else
     : ${CORES:=$(nproc 2>/dev/null)}
diff --git a/build-libcxx.sh b/build-libcxx.sh
index d6a38f3..01b1dd2 100755
--- a/build-libcxx.sh
+++ b/build-libcxx.sh
@@ -62,7 +62,6 @@ cd runtimes
 
 if command -v ninja >/dev/null; then
     CMAKE_GENERATOR="Ninja"
-    NINJA=1
     BUILDCMD=ninja
 else
     : ${CORES:=$(nproc 2>/dev/null)}
diff --git a/build-lldb-mi.sh b/build-lldb-mi.sh
index 33c17b2..cdd2ddd 100755
--- a/build-lldb-mi.sh
+++ b/build-lldb-mi.sh
@@ -53,7 +53,6 @@ fi
 
 if command -v ninja >/dev/null; then
     CMAKE_GENERATOR="Ninja"
-    NINJA=1
     BUILDCMD=ninja
 else
     : ${CORES:=$(nproc 2>/dev/null)}
diff --git a/build-llvm.sh b/build-llvm.sh
index dbf71c8..60e90f9 100755
--- a/build-llvm.sh
+++ b/build-llvm.sh
@@ -138,7 +138,6 @@ fi
 
 if command -v ninja >/dev/null; then
     CMAKE_GENERATOR="Ninja"
-    NINJA=1
     BUILDCMD=ninja
 else
     : ${CORES:=$(nproc 2>/dev/null)}
diff --git a/build-openmp.sh b/build-openmp.sh
index 5de6246..90a33e8 100755
--- a/build-openmp.sh
+++ b/build-openmp.sh
@@ -52,7 +52,6 @@ cd llvm-project/openmp
 
 if command -v ninja >/dev/null; then
     CMAKE_GENERATOR="Ninja"
-    NINJA=1
     BUILDCMD=ninja
 else
     : ${CORES:=$(nproc 2>/dev/null)}