diff --git a/node_modules/qqjs/node_modules/execa/index.js b/node_modules/qqjs/node_modules/execa/index.js
index 06f3969..7ab1b66 100644
--- a/node_modules/qqjs/node_modules/execa/index.js
+++ b/node_modules/qqjs/node_modules/execa/index.js
@@ -14,6 +14,17 @@ const stdio = require('./lib/stdio');
 
 const TEN_MEGABYTES = 1000 * 1000 * 10;
 
+// OSTYPE is 'msys' for MSYS 1.0 and for MSYS2, or 'cygwin' for Cygwin
+// but note that OSTYPE is not "exported" by default, so run: export OSTYPE=$OSTYPE
+// MSYSTEM is 'MINGW32' for MSYS 1.0, 'MSYS' for MSYS2, and undefined for Cygwin
+const isCygwin = process.env.OSTYPE === 'cygwin';
+const isMinGW = process.env.MSYSTEM && process.env.MSYSTEM.startsWith('MINGW');
+const isMSYS2 = process.env.MSYSTEM && process.env.MSYSTEM.startsWith('MSYS');
+
+console.log(`[patched execa] detected "${
+	isCygwin ? 'Cygwin' : isMinGW ? 'MinGW' : isMSYS2 ? 'MSYS2' : 'standard'
+}" environment (MSYSTEM="${process.env.MSYSTEM}")`);
+
 function handleArgs(cmd, args, opts) {
 	let parsed;
 
@@ -104,13 +115,21 @@ function handleShell(fn, cmd, opts) {
 
 	opts = Object.assign({}, opts);
 
-	if (process.platform === 'win32') {
+	if (isMSYS2 || isMinGW || isCygwin) {
+		file = process.env.MSYSSHELLPATH ||
+			(isMSYS2 ? 'C:\\msys64\\usr\\bin\\bash.exe' :
+				(isMinGW ? 'C:\\MinGW\\msys\\1.0\\bin\\bash.exe' :
+					(isCygwin ? 'C:\\cygwin64\\bin\\bash.exe' : file)));
+	}
+	else if (process.platform === 'win32') {
 		opts.__winShell = true;
 		file = process.env.comspec || 'cmd.exe';
 		args = ['/s', '/c', `"${cmd}"`];
 		opts.windowsVerbatimArguments = true;
 	}
 
+	console.log(`[patched execa] handleShell file="${file}" args="[${args}]"`);
+
 	if (opts.shell) {
 		file = opts.shell;
 		delete opts.shell;
@@ -364,3 +383,7 @@ module.exports.sync = (cmd, args, opts) => {
 module.exports.shellSync = (cmd, opts) => handleShell(module.exports.sync, cmd, opts);
 
 module.exports.spawn = util.deprecate(module.exports, 'execa.spawn() is deprecated. Use execa() instead.');
+
+module.exports.isCygwin = isCygwin;
+module.exports.isMinGW = isMinGW;
+module.exports.isMSYS2 = isMSYS2;