fix: no error report when 'build' folder is already exists on Windows

justfile

@@ -30,8 +30,9 @@ run-tests cc=default_cc: (build-tests cc)
     done
 
 nmake-tests:
+    New-Item {{ outpath }} -ItemType Directory -ea 0
     nmake -f nmakefile
-    Get-ChildItem build -Filter *.exe | Foreach-Object { & $_.FullName }
+    Get-ChildItem {{ outpath }} -Filter *.exe | Foreach-Object { & $_.FullName }
 
 clean:
-    rm -r ./build
+    rm -r {{ outpath }}

nmakefile

@@ -1,4 +1,3 @@
-
 CC = cl
 INCLUDES = ./include
 CXXFLAGS = /std:c++20 /EHs /Wall /Fo./build/
@@ -7,7 +6,6 @@ EXES = $(**:.cpp=.exe)
 
 .SUFFIXES: .cpp .exe
 all: tests\*.cpp
-    mkdir build
     $(MAKE) /f nmakefile $(EXES:tests=build)
 
 {tests\}.cpp{build\}.exe: