pkg(python-3.9.1): match new build system

packages/python-3.9.1/build.sh

@@ -1,19 +1,10 @@
 #!/bin/bash
 
-mkdir -p build/tmp build/python
-cd build
-
 curl "https://www.python.org/ftp/python/3.9.1/Python-3.9.1.tgz" -o python.tar.gz
-tar xzf python.tar.gz --strip-components=1 -C python
-
-cd python
-
+tar xzf python.tar.gz --strip-components=1
+rm python.tar.gz
 
 ./configure --prefix /piston/packages/python/3.9.1/python-3.9.1
 make -j$(nproc)
-DESTDIR=build/tmp make altinstall -j$(nproc)
-
-
-mv build/tmp/piston/packages/python/3.9.1/python-3.9.1 ../../output
-
+ln -s python python3.9
 

packages/python-3.9.1/environment

@@ -1 +1 @@
-export PATH=$PWD/bin:$PATH
+export PATH=$PWD:$PATH

packages/python-3.9.1/metadata.json

@@ -2,6 +2,5 @@
     "language": "python",
     "version": "3.9.1",
     "author": "Thomas Hobson <thomas@hexf.me>",
-    "dependencies": {},
     "aliases": ["py", "python3"]
 }