vpcs: fix build with glibc 2.26

Tracking issue: #31696

pkgs/applications/virtualization/vpcs/default.nix

@@ -6,26 +6,27 @@ stdenv.mkDerivation rec {
   version = "0.8";
 
   src = fetchurl {
+    name = "${name}.tar.bz2";
     url = "mirror://sourceforge/project/${pname}/${version}/${name}-src.tbz";
     sha256 = "14y9nflcyq486vvw0na0fkfmg5dac004qb332v4m5a0vaz8059nw";
   };
 
-  unpackCmd = "tar -xjf $src";
+  patches = [ ./vpcs-0.8-glibc-2.26.patch ];
 
   buildInputs = [ glibc.static ];
 
-  buildPhase = ''
+  buildPhase = ''(
     cd src
     ./mk.sh ${buildPlatform.platform.kernelArch}
-  '';
+  )'';
 
   installPhase = ''
-    cd ..
-
     install -D -m555 src/vpcs $out/bin/vpcs;
     install -D -m444 man/vpcs.1 $out/share/man/man1/vpcs.1;
   '';
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "Virtual PC simulator";
     longDescription = ''

pkgs/applications/virtualization/vpcs/vpcs-0.8-glibc-2.26.patch

@@ -0,0 +1,14 @@
+diff --git a/src/getopt.h b/src/getopt.h
+index 4394aa2..bf59e10 100644
+--- a/src/getopt.h
++++ b/src/getopt.h
+@@ -49,9 +49,6 @@ extern int optind;
+ extern int opterr;
+ extern int optopt;
+ 
+-#ifndef FreeBSD
+-int getopt(int argc, char** argv, char* optstr);
+-#endif
+ int arg_to_int(const char* arg, int min, int max, int defalt);
+ 
+ #ifdef __cplusplus