diff --git a/source/dub/compilers/dmd.d b/source/dub/compilers/dmd.d
index b77ee4a..a181222 100644
--- a/source/dub/compilers/dmd.d
+++ b/source/dub/compilers/dmd.d
@@ -10,13 +10,13 @@
 import dub.compilers.compiler;
 import dub.compilers.utils;
 import dub.internal.utils;
+import dub.internal.vibecompat.core.file;
 import dub.internal.vibecompat.inet.path;
 import dub.internal.logging;
 
 import std.algorithm;
 import std.array;
 import std.exception;
-import std.file;
 import std.typecons;
 
 // Determines whether the specified process is running under WOW64 or an Intel64 of x64 processor.
@@ -365,7 +365,7 @@
 		auto res_file = getTempFile("dub-build", ".rsp");
 		const(string)[] args = settings.dflags;
 		if (platform.frontendVersion >= 2066) args ~= "-vcolumns";
-		std.file.write(res_file.toNativeString(), escapeArgs(args).join("\n"));
+		writeFile(res_file, escapeArgs(args).join("\n"));
 
 		logDiagnostic("%s %s", platform.compilerBinary, escapeArgs(args).join(" "));
 		string[string] env;
@@ -394,7 +394,7 @@
 		}
 
 		auto res_file = getTempFile("dub-build", ".lnk");
-		std.file.write(res_file.toNativeString(), escapeArgs(args).join("\n"));
+		writeFile(res_file, escapeArgs(args).join("\n"));
 
 		logDiagnostic("%s %s", platform.compilerBinary, escapeArgs(args).join(" "));
 		string[string] env;
diff --git a/source/dub/compilers/gdc.d b/source/dub/compilers/gdc.d
index 422a513..9b42b33 100644
--- a/source/dub/compilers/gdc.d
+++ b/source/dub/compilers/gdc.d
@@ -10,13 +10,13 @@
 import dub.compilers.compiler;
 import dub.compilers.utils;
 import dub.internal.utils;
+import dub.internal.vibecompat.core.file;
 import dub.internal.vibecompat.inet.path;
 import dub.internal.logging;
 
 import std.algorithm;
 import std.array;
 import std.exception;
-import std.file;
 import std.process;
 import std.typecons;
 
@@ -208,7 +208,7 @@
 	void invoke(in BuildSettings settings, in BuildPlatform platform, void delegate(int, string) output_callback)
 	{
 		auto res_file = getTempFile("dub-build", ".rsp");
-		std.file.write(res_file.toNativeString(), join(settings.dflags.map!(s => escape(s)), "\n"));
+		writeFile(res_file, join(settings.dflags.map!(s => escape(s)), "\n"));
 
 		logDiagnostic("%s %s", platform.compilerBinary, join(cast(string[])settings.dflags, " "));
 		string[string] env;
diff --git a/source/dub/compilers/ldc.d b/source/dub/compilers/ldc.d
index 76c42e2..f071d7b 100644
--- a/source/dub/compilers/ldc.d
+++ b/source/dub/compilers/ldc.d
@@ -10,13 +10,13 @@
 import dub.compilers.compiler;
 import dub.compilers.utils;
 import dub.internal.utils;
+import dub.internal.vibecompat.core.file;
 import dub.internal.vibecompat.inet.path;
 import dub.internal.logging;
 
 import std.algorithm;
 import std.array;
 import std.exception;
-import std.file;
 import std.typecons;
 
 
@@ -250,7 +250,7 @@
 		auto res_file = getTempFile("dub-build", ".rsp");
 		const(string)[] args = settings.dflags;
 		if (platform.frontendVersion >= 2066) args ~= "-vcolumns";
-		std.file.write(res_file.toNativeString(), escapeArgs(args).join("\n"));
+		writeFile(res_file, escapeArgs(args).join("\n"));
 
 		logDiagnostic("%s %s", platform.compilerBinary, escapeArgs(args).join(" "));
 		string[string] env;
@@ -273,7 +273,7 @@
 		args ~= settings.dflags.filter!(f => isLinkerDFlag(f)).array;
 
 		auto res_file = getTempFile("dub-build", ".lnk");
-		std.file.write(res_file.toNativeString(), escapeArgs(args).join("\n"));
+		writeFile(res_file, escapeArgs(args).join("\n"));
 
 		logDiagnostic("%s %s", platform.compilerBinary, escapeArgs(args).join(" "));
 		string[string] env;
diff --git a/source/dub/package_.d b/source/dub/package_.d
index c406925..010ee79 100644
--- a/source/dub/package_.d
+++ b/source/dub/package_.d
@@ -27,7 +27,6 @@
 import std.array;
 import std.conv;
 import std.exception;
-import std.file;
 import std.range;
 import std.string;
 import std.typecons : Nullable;
diff --git a/source/dub/recipe/packagerecipe.d b/source/dub/recipe/packagerecipe.d
index 74ef546..d282233 100644
--- a/source/dub/recipe/packagerecipe.d
+++ b/source/dub/recipe/packagerecipe.d
@@ -493,7 +493,7 @@
 					enforce(!spath.empty, "Paths must not be empty strings.");
 					auto path = NativePath(spath);
 					if (!path.absolute) path = base_path ~ path;
-					if (!existsFile(path) || !isDir(path.toNativeString())) {
+					if (!existsDirectory(path)) {
 						import std.algorithm : any, find;
 						const hasVar = chain(buildSettingsVars, envVarCache.get.byKey).any!((string var) {
 							return spath.find("$"~var).length > 0 || spath.find("${"~var~"}").length > 0;