diff --git a/blueprints/libs/runtime/runtime.py b/blueprints/libs/runtime/runtime.py
index 75ca8116a..c62b45cb3 100644
--- a/blueprints/libs/runtime/runtime.py
+++ b/blueprints/libs/runtime/runtime.py
@@ -1,72 +1,78 @@
 import info
 import glob
 
 class subinfo(info.infoclass):
     def registerOptions(self):
         self.parent.package.categoryInfo.platforms = CraftCore.compiler.Platforms.Windows
 
     def setTargets(self):
         # not used  yet only for reference
         ver = str(CraftCore.compiler.getVersion())
         self.patchLevel[ver] = 1
         self.targets[ver] = ""
         self.description = "The compiler runtime package"
         self.defaultTarget = ver
 
     def setDependencies(self):
         self.buildDependencies["virtual/base"] = None
         if CraftCore.compiler.isMinGW():
             self.buildDependencies["dev-utils/mingw-w64"] = None
 
 
 from Package.BinaryPackageBase import *
 
 
 class PackageWin(BinaryPackageBase):
     def __init__(self):
         BinaryPackageBase.__init__(self)
         self.subinfo.options.package.disableBinaryCache = CraftCore.compiler.isMSVC()
 
     def fetch(self):
         return True
 
     def unpack(self):
         return True
 
     def install(self):
         destdir = os.path.join(self.installDir(), "bin")
         utils.createDir(destdir)
 
         files = []
         if CraftCore.compiler.isMinGW():
             files = ['libgomp-1.dll', 'libstdc++-6.dll', 'libwinpthread-1.dll']
             if CraftCore.compiler.isMinGW_W32():
                 files.append('libgcc_s_sjlj-1.dll')
                 srcdir = os.path.join(self.rootdir, "mingw", "bin")
             elif CraftCore.compiler.isMinGW_W64():
                 files.append('libgcc_s_seh-1.dll')
                 srcdir = os.path.join(self.rootdir, "mingw64", "bin")
         elif CraftCore.compiler.isMSVC():
             if self.buildType() != "Debug":
                 if CraftCore.compiler.isMSVC2017():
-                    redistDir = os.environ["VCTOOLSREDISTDIR"]
+                    if "VCTOOLSREDISTDIR" in os.environ:
+                        redistDir = os.environ["VCTOOLSREDISTDIR"]
+                    else:
+                        CraftCore.log.error("Could not find Mycrosoft Visual Studio 2017.\nVCTOOLSREDISTDIR does not exist, and should point to '*\Microsoft Visual Studio\2017\Community\VC\Redist\MSVC\xx.xx.xxxxx'.")
                 elif CraftCore.compiler.isMSVC2015():
-                    redistDir = os.path.join(os.environ["VCINSTALLDIR"], "redist")
+                    if "VCINSTALLDIR" in os.environ:
+                        redistDir = os.path.join(os.environ["VCINSTALLDIR"], "redist")
+                    else:
+                        CraftCore.log.error("Could not find Mycrosoft Visual Studio 2015.\nVCINSTALLDIR does not exist, and should point to '*\Microsoft Visual Studio\2015\Community\VC\'.")
                 if redistDir:
                     files = glob.glob(os.path.join(redistDir, CraftCore.compiler.architecture, "**/*.dll"), recursive=True)
                 else:
                     CraftCore.log.error("Unsupported Compiler")
                     return False
         for f in files:
             if not os.path.isabs(f):
                 f = os.path.join(srcdir, f)
             utils.copyFile(f, os.path.join(destdir, os.path.basename(f)), linkOnly=False)
         return True
 
 
 from Package.Qt5CorePackageBase import *
 
 
 class Package(Qt5CoreSdkPackageBase):
     def __init__(self):
         Qt5CoreSdkPackageBase.__init__(self, condition=OsUtils.isWin(), classA=PackageWin)