Fails to unpack haproxy tarball

[mbjelac]

Copied from Gitlab deploy-to-heroku output (hence remote: prefix):

remote: Compressing source files... done.        
 remote: Building source:        
 remote: 
 remote: -----> HaProxy app detected        
 remote: Downloading http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.22.tar.gz...        
 remote:   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current        
 remote:                                  Dload  Upload   Total   Spent    Left  Speed        
 remote:   0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0        
 remote: Unpacking...        
 remote: 
 remote: gzip: stdin: unexpected end of file        
 remote: tar: Child returned status 1        
 remote: tar: Error is not recoverable: exiting now        
 remote: Compiling haproxy-1.4.22...        
 remote: /app/tmp/buildpacks/50b3dae450fdfec110b216cec416825df029c770b0fc3cbe003934203c3038ec5c8d1df30f77c2f4d12c63a81b8899d7dcdff541987b00d982abd4280dde11e7/bin/compile: line 37: cd: /app/tmp/cache/haproxy-1.4.22: No such file or directory        
 remote: make: *** No targets specified and no makefile found.  Stop.        
 remote: cp: cannot stat '/app/tmp/cache/haproxy-1.4.22/haproxy': No such file or directory        
 remote: -----> Done.        
 remote: -----> Discovering process types        
 remote:        Procfile declares types -> (none)        
 remote: 
 remote: -----> Compressing...        
 remote:        Done: 1.9K        
 remote: -----> Launching...        
 remote:        Released v4        
 remote:        ************************* deployed to Heroku        
 remote: 
 remote: Verifying deploy... done. 

I tried to download the tarball on my machine, unpacks fine. Didn't try your compile script though...