Syntax fix.

.github/workflows/ccpp.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - name: apt
-      run: sudo apt update && sudo apt install bison flex ninja-build lua lua-posix
+      run: sudo apt update && sudo apt install bison flex ninja-build lua5.1 lua-posix
     - name: make
       run: make LUA=lua
 
@@ -20,7 +20,7 @@ jobs:
       run: brew install ninja lua luarocks
     - name: luarocks
       run: |
-        luarocks install luaposix
+        luarocks install lua-posix
     - name: make
       run: make LUA=lua
 
@@ -38,14 +38,14 @@ jobs:
           make
           mingw-w64-i686-gcc
           mingw-w64-i686-lua
-          mingw-w64-x86_64-lua-luarocks
+          mingw-w64-i686-lua-luarocks
           ninja
           bison
           flex
           zip
     - name: luarocks
       run: |
-        luarocks install luaposix
+        /mingw32/bin/luarocks install lua-posix
     - uses: actions/checkout@v3
     - name: build
       run: |