diff --git a/npm-scripts.js b/npm-scripts.js
index 66ce1e5001..2e8a8ab4b5 100644
--- a/npm-scripts.js
+++ b/npm-scripts.js
@@ -3,7 +3,7 @@
 const process = require('process');
 const os = require('os');
 const fs = require('fs');
-const { execSync } = require('child_process');
+const { execSync, spawnSync } = require('child_process');
 const { version } = require('./package.json');
 
 const isFreeBSD = os.platform() === 'freebsd';
@@ -227,6 +227,21 @@ function buildWorker()
 {
 	console.log('npm-scripts.js [INFO] buildWorker()');
 
+	if (isWindows)
+	{
+		if (!fs.existsSync('worker/out/msys/bin/make.exe'))
+		{
+			installMsysMake();
+		}
+
+		const msysPath = `${process.cwd()}\\worker\\out\\msys\\bin`;
+
+		if (!process.env['PATH'].includes(msysPath))
+		{
+			process.env['PATH'] = `${msysPath};${process.env['PATH']}`;
+		}
+	}
+
 	executeCmd(`${MAKE} -C worker`);
 }
 
@@ -240,6 +255,11 @@ function cleanWorker()
 	executeCmd(`${MAKE} clean-subprojects -C worker`);
 	// Clean PIP/Meson/Ninja.
 	executeCmd(`${MAKE} clean-pip -C worker`);
+
+	if (isWindows)
+	{
+		executeCmd('rd /s /q worker\\out\\msys');
+	}
 }
 
 function lintNode()
@@ -323,3 +343,25 @@ function executeCmd(command, exitOnError = true)
 		}
 	}
 }
+
+function installMsysMake()
+{
+	console.log('npm-scripts.js [INFO] installMsysMake()');
+
+	let res = spawnSync('where', [ 'python3.exe' ]);
+
+	if (res.status !== 0)
+	{
+		res = spawnSync('where', [ 'python.exe' ]);
+
+		if (res.status !== 0)
+		{
+			// eslint-disable-next-line no-console
+			console.error('`npm-scripts.js [ERROR] installMsysMake() cannot find Python executable');
+
+			process.exit(1);
+		}
+	}
+
+	executeCmd(`${String(res.stdout).trim()} worker\\scripts\\getmake.py`);
+}
diff --git a/worker/build.rs b/worker/build.rs
index 1686acf30c..7d2264bfaf 100644
--- a/worker/build.rs
+++ b/worker/build.rs
@@ -77,7 +77,40 @@ fn main() {
     }
     #[cfg(target_os = "windows")]
     {
-        // Nothing special is needed so far
+        if !std::path::Path::new("worker/out/msys/bin/make.exe").exists() {
+            let python = if Command::new("where")
+                .arg("python3.exe")
+                .status()
+                .expect("Failed to start")
+                .success()
+            {
+                "python3"
+            } else {
+                "python"
+            };
+
+            if !Command::new(python)
+                .arg("scripts\\getmake.py")
+                .status()
+                .expect("Failed to start")
+                .success()
+            {
+                panic!("Failed to install MSYS/make")
+            }
+        }
+
+        env::set_var(
+            "PATH",
+            format!(
+                "{}\\worker\\out\\msys\\bin;{}",
+                env::current_dir()
+                    .unwrap()
+                    .into_os_string()
+                    .into_string()
+                    .unwrap(),
+                env::var("PATH").unwrap()
+            ),
+        );
     }
 
     // Build
diff --git a/worker/scripts/cpu_cores.sh b/worker/scripts/cpu_cores.sh
index e507b693d5..b5cdde81d0 100755
--- a/worker/scripts/cpu_cores.sh
+++ b/worker/scripts/cpu_cores.sh
@@ -6,8 +6,9 @@ OS="$(uname -s)"
 NUM_CORES=
 
 case "${OS}" in
-	Linux*|MINGW*)    NUM_CORES=$(nproc);;
+	Linux*)           NUM_CORES=$(nproc);;
 	Darwin*|FreeBSD)  NUM_CORES=$(sysctl -n hw.ncpu);;
+	MINGW*)           NUM_CORES=$NUMBER_OF_PROCESSORS;;
 	*)                NUM_CORES=1;;
 esac
 
diff --git a/worker/scripts/getmake.py b/worker/scripts/getmake.py
new file mode 100644
index 0000000000..c6c0dbb9a3
--- /dev/null
+++ b/worker/scripts/getmake.py
@@ -0,0 +1,17 @@
+import io, hashlib, tarfile, urllib.request
+
+def get(url, digest):
+  data = urllib.request.urlopen(url).read()
+  assert hashlib.sha256(data).hexdigest() == digest
+  tar = tarfile.open(fileobj=io.BytesIO(data))
+  tar.extractall('worker/out/msys')
+  tar.close()
+
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/msys-core/msys-1.0.19-1/msysCORE-1.0.19-1-msys-1.0.19-bin.tar.xz/download', '8c4157d739a460f85563bc4451e9f1bbd42b13c4f63770d43b9f45a781f07858')
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/libiconv/libiconv-1.14-1/libiconv-1.14-1-msys-1.0.17-dll-2.tar.lzma/download', '196921e8c232259c8e6a6852b9ee8d9ab2d29a91419f0c8dc27ba6f034231683')
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/gettext/gettext-0.18.1.1-1/libintl-0.18.1.1-1-msys-1.0.17-dll-8.tar.lzma/download', '29db8c969661c511fbe2a341ab25c993c5f9c555842a75d6ddbcfa70dec16910')
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/coreutils/coreutils-5.97-3/coreutils-5.97-3-msys-1.0.13-bin.tar.lzma/download', 'f8c7990416ea16a74ac336dcfe0f596bc46b8724b2d58cf8a3509414220b2366')
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/regex/regex-1.20090805-2/libregex-1.20090805-2-msys-1.0.13-dll-1.tar.lzma/download', '85dd8c1e27a90675c5f867be57ba7ae2bb55dde8cd2d19f284c896be134bd3d1')
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/termcap/termcap-0.20050421_1-2/libtermcap-0.20050421_1-2-msys-1.0.13-dll-0.tar.lzma/download', '62b58fe0880f0972fcc84a819265989b02439c1c5185870227bd25f870f7adb6')
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/bash/bash-3.1.23-1/bash-3.1.23-1-msys-1.0.18-bin.tar.xz/download', '38da5419969ab883058a96322bb0f51434dd4e9f71de09cd4f75b96750944533')
+get('https://sourceforge.net/projects/mingw/files/MSYS/Base/make/make-3.81-3/make-3.81-3-msys-1.0.13-bin.tar.lzma/download', '847f0cbbf07135801c8e67bf692d29b1821e816ad828753c997fa869a9b89988')