diff --git a/pkgs/tools/audio/mpd-mpris/default.nix b/pkgs/tools/audio/mpd-mpris/default.nix
index af4000dfa44..b90ab80befd 100644
--- a/pkgs/tools/audio/mpd-mpris/default.nix
+++ b/pkgs/tools/audio/mpd-mpris/default.nix
@@ -29,6 +29,6 @@ buildGoModule rec {
     homepage = "https://github.com/natsukagami/mpd-mpris";
     license = licenses.mit;
     maintainers = with maintainers; [ doronbehar ];
-    platforms = platforms.linux;
+    platforms = platforms.unix;
   };
 }
diff --git a/pkgs/tools/cd-dvd/cdi2iso/default.nix b/pkgs/tools/cd-dvd/cdi2iso/default.nix
index 9df7ab7657f..26768747a46 100644
--- a/pkgs/tools/cd-dvd/cdi2iso/default.nix
+++ b/pkgs/tools/cd-dvd/cdi2iso/default.nix
@@ -1,4 +1,4 @@
-{lib, stdenv, fetchurl}:
+{ lib, stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
   pname = "cdi2iso";
@@ -9,9 +9,13 @@ stdenv.mkDerivation rec {
     sha256 = "0fj2fxhpr26z649m0ph71378c41ljflpyk89g87x8r1mc4rbq3kh";
   };
 
+  postPatch = ''
+    substituteInPlace Makefile --replace "gcc" "${stdenv.cc.targetPrefix}cc"
+  '';
+
   installPhase = ''
-    mkdir -p $out/bin/
-    cp cdi2iso $out/bin/
+    mkdir -p $out/bin
+    cp cdi2iso $out/bin
   '';
 
   meta = with lib; {
@@ -19,6 +23,6 @@ stdenv.mkDerivation rec {
     homepage = "https://sourceforge.net/projects/cdi2iso.berlios";
     license = licenses.gpl2;
     maintainers = with maintainers; [ hrdinka ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/compression/dejsonlz4/default.nix b/pkgs/tools/compression/dejsonlz4/default.nix
index 9e6f95aecb8..07b6a5979a4 100644
--- a/pkgs/tools/compression/dejsonlz4/default.nix
+++ b/pkgs/tools/compression/dejsonlz4/default.nix
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
     };
 
     buildPhase = ''
-      gcc -Wall -o dejsonlz4 src/dejsonlz4.c src/lz4.c
+      ${stdenv.cc.targetPrefix}cc -o dejsonlz4 src/dejsonlz4.c src/lz4.c
     '';
 
     installPhase = ''
@@ -23,6 +23,6 @@ stdenv.mkDerivation rec {
       homepage = "https://github.com/avih/dejsonlz4";
       license = licenses.bsd2;
       maintainers = with maintainers; [ mt-caret ];
-      platforms = platforms.linux;
+      platforms = platforms.all;
     };
   }
diff --git a/pkgs/tools/compression/zdelta/builder.sh b/pkgs/tools/compression/zdelta/builder.sh
deleted file mode 100644
index 03db413181d..00000000000
--- a/pkgs/tools/compression/zdelta/builder.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-source $stdenv/setup
-
-installPhase() {
-    mkdir -p $out/bin
-    cp -p zdc zdu $out/bin
-}
-
-genericBuild
diff --git a/pkgs/tools/compression/zdelta/default.nix b/pkgs/tools/compression/zdelta/default.nix
index 46760c91306..b30a43f33c1 100644
--- a/pkgs/tools/compression/zdelta/default.nix
+++ b/pkgs/tools/compression/zdelta/default.nix
@@ -1,16 +1,24 @@
-{lib, stdenv, fetchurl}:
+{ lib, stdenv, fetchurl }:
 
 stdenv.mkDerivation rec {
-  name = "zdelta-2.1";
-  builder = ./builder.sh;
+  pname = "zdelta";
+  version = "2.1";
+
   src = fetchurl {
-    url = "${meta.homepage}/downloads/${name}.tar.gz";
-    sha256 = "0k6y0r9kv5qiglnr2j4a0yvfynjkvm0pyv8ly28j0pr3w6rbxrh3";
+    url = "https://web.archive.org/web/20160316212948/http://cis.poly.edu/zdelta/downloads/zdelta-2.1.tar.gz";
+    sha256 = "sha256-WiQKWxJkINIwRBcdiuVLMDiupQ8gOsiXOEZvHDa5iFg=";
   };
 
+  makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp -p zdc zdu $out/bin
+  '';
+
   meta = with lib; {
-    homepage = "http://cis.poly.edu/zdelta";
-    platforms = platforms.linux;
+    homepage = "https://web.archive.org/web/20160316212948/http://cis.poly.edu/zdelta/";
+    platforms = platforms.all;
     license = licenses.zlib;
   };
 }
diff --git a/pkgs/tools/filesystems/catcli/default.nix b/pkgs/tools/filesystems/catcli/default.nix
index 1552505701d..be9349daa27 100644
--- a/pkgs/tools/filesystems/catcli/default.nix
+++ b/pkgs/tools/filesystems/catcli/default.nix
@@ -25,6 +25,6 @@ buildPythonApplication rec {
     homepage = "https://github.com/deadc0de6/catcli";
     license = licenses.gpl3;
     maintainers = with maintainers; [ petersjt014 ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/filesystems/cpcfs/default.nix b/pkgs/tools/filesystems/cpcfs/default.nix
index 2aa63208e00..a439e29358f 100644
--- a/pkgs/tools/filesystems/cpcfs/default.nix
+++ b/pkgs/tools/filesystems/cpcfs/default.nix
@@ -36,6 +36,6 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/derikz/cpcfs/" ;
     license = licenses.bsd2;
     maintainers = [ ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/filesystems/idsk/default.nix b/pkgs/tools/filesystems/idsk/default.nix
index 12a0af7ea4d..0b7ae339053 100644
--- a/pkgs/tools/filesystems/idsk/default.nix
+++ b/pkgs/tools/filesystems/idsk/default.nix
@@ -24,6 +24,6 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/cpcsdk/idsk" ;
     license = licenses.mit;
     maintainers = [ ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/graphics/epstool/default.nix b/pkgs/tools/graphics/epstool/default.nix
index 8052434ff0b..6910f458a17 100644
--- a/pkgs/tools/graphics/epstool/default.nix
+++ b/pkgs/tools/graphics/epstool/default.nix
@@ -9,6 +9,12 @@ stdenv.mkDerivation rec {
     sha256 = "1pfgqbipwk36clhma2k365jkpvyy75ahswn8jczzys382jalpwgk";
   };
 
+  makeFlags = [
+    "CC=${stdenv.cc.targetPrefix}cc"
+    "CLINK=${stdenv.cc.targetPrefix}cc"
+    "LINK=${stdenv.cc.targetPrefix}cc"
+  ];
+
   installPhase = ''
     make EPSTOOL_ROOT=$out install
   '';
@@ -20,6 +26,6 @@ stdenv.mkDerivation rec {
     homepage = "http://pages.cs.wisc.edu/~ghost/gsview/epstool.htm";
     license = licenses.gpl2;
     maintainers = [ maintainers.asppsa ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/graphics/imgurbash2/default.nix b/pkgs/tools/graphics/imgurbash2/default.nix
index 8b79e3373a6..30848d7d0dc 100644
--- a/pkgs/tools/graphics/imgurbash2/default.nix
+++ b/pkgs/tools/graphics/imgurbash2/default.nix
@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     description = "A shell script that uploads images to imgur";
     license = licenses.mit;
-    platforms = platforms.linux;
+    platforms = platforms.all;
     maintainers = with maintainers; [ abbradar ];
     homepage = "https://github.com/ram-on/imgurbash2";
   };
diff --git a/pkgs/tools/graphics/spirv-cross/default.nix b/pkgs/tools/graphics/spirv-cross/default.nix
index cb5a37527bf..19359698f02 100644
--- a/pkgs/tools/graphics/spirv-cross/default.nix
+++ b/pkgs/tools/graphics/spirv-cross/default.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
     description = "A tool designed for parsing and converting SPIR-V to other shader languages";
     homepage = "https://github.com/KhronosGroup/SPIRV-Cross";
     changelog = "https://github.com/KhronosGroup/SPIRV-Cross/releases/tag/${version}";
-    platforms = platforms.linux;
+    platforms = platforms.all;
     license = licenses.asl20;
     maintainers = with maintainers; [ Flakebi ];
   };
diff --git a/pkgs/tools/misc/apparix/default.nix b/pkgs/tools/misc/apparix/default.nix
index 7d8de2c1436..d446a2cf0af 100644
--- a/pkgs/tools/misc/apparix/default.nix
+++ b/pkgs/tools/misc/apparix/default.nix
@@ -15,6 +15,6 @@ stdenv.mkDerivation rec {
     description = "Add directory bookmarks, distant listing, and distant editing to the command line";
     maintainers = with maintainers; [ lethalman ];
     license = licenses.gpl2;
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/misc/bash_unit/default.nix b/pkgs/tools/misc/bash_unit/default.nix
index 2fd93cb33b9..7541281eeb6 100644
--- a/pkgs/tools/misc/bash_unit/default.nix
+++ b/pkgs/tools/misc/bash_unit/default.nix
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     description = "Bash unit testing enterprise edition framework for professionals";
     maintainers = with maintainers; [ pamplemousse ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
     license = licenses.gpl3Plus;
   };
 }
diff --git a/pkgs/tools/misc/bbe/default.nix b/pkgs/tools/misc/bbe/default.nix
index fb62b8be894..5cd7326d7b1 100644
--- a/pkgs/tools/misc/bbe/default.nix
+++ b/pkgs/tools/misc/bbe/default.nix
@@ -16,7 +16,7 @@ stdenv.mkDerivation rec {
     description = "A sed-like editor for binary files";
     homepage = "http://bbe-.sourceforge.net/";
     license = licenses.gpl2Plus;
-    platforms = platforms.linux;
+    platforms = platforms.all;
     maintainers = [ maintainers.hhm ];
   };
 }
diff --git a/pkgs/tools/misc/bcunit/default.nix b/pkgs/tools/misc/bcunit/default.nix
index bc3bbc8276d..099ae294bec 100644
--- a/pkgs/tools/misc/bcunit/default.nix
+++ b/pkgs/tools/misc/bcunit/default.nix
@@ -25,6 +25,6 @@ stdenv.mkDerivation rec {
     homepage = "https://gitlab.linphone.org/BC/public/bcunit";
     license = licenses.lgpl2Plus;
     maintainers = with maintainers; [ raskin jluttine ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/misc/git-fire/default.nix b/pkgs/tools/misc/git-fire/default.nix
index bba1bd65a54..15dc34cd526 100644
--- a/pkgs/tools/misc/git-fire/default.nix
+++ b/pkgs/tools/misc/git-fire/default.nix
@@ -23,7 +23,7 @@ stdenv.mkDerivation {
     '';
     homepage = "https://github.com/qw3rtman/git-fire";
     license = licenses.mit;
-    platforms = platforms.linux;
+    platforms = platforms.all;
     maintainers = [ maintainers.swflint ];
   };
 }
diff --git a/pkgs/tools/misc/ministat/default.nix b/pkgs/tools/misc/ministat/default.nix
index 68670599c1e..0cd3ff3a5c1 100644
--- a/pkgs/tools/misc/ministat/default.nix
+++ b/pkgs/tools/misc/ministat/default.nix
@@ -26,6 +26,6 @@ stdenv.mkDerivation rec {
     homepage = "https://git.decadent.org.uk/gitweb/?p=ministat.git";
     license = licenses.beerware;
     maintainers = [ maintainers.dezgeg ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/misc/sfeed/default.nix b/pkgs/tools/misc/sfeed/default.nix
index 57e49c88745..93ef69ea2ea 100644
--- a/pkgs/tools/misc/sfeed/default.nix
+++ b/pkgs/tools/misc/sfeed/default.nix
@@ -27,6 +27,6 @@ stdenv.mkDerivation rec {
     '';
     license = licenses.isc;
     maintainers = [ maintainers.matthiasbeyer ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 }
diff --git a/pkgs/tools/misc/vimer/default.nix b/pkgs/tools/misc/vimer/default.nix
index 1fbb85f0751..bbab2d64bb0 100644
--- a/pkgs/tools/misc/vimer/default.nix
+++ b/pkgs/tools/misc/vimer/default.nix
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     '';
     license = licenses.mit;
     maintainers = [ maintainers.matthiasbeyer ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 
 }
diff --git a/pkgs/tools/networking/altermime/default.nix b/pkgs/tools/networking/altermime/default.nix
index c28df461459..703af40864a 100644
--- a/pkgs/tools/networking/altermime/default.nix
+++ b/pkgs/tools/networking/altermime/default.nix
@@ -1,12 +1,11 @@
-{ lib, stdenv, fetchurl }:
+{ lib, gccStdenv, fetchurl }:
 
-stdenv.mkDerivation rec {
-  baseName = "altermime";
-  name = "${baseName}-${version}";
+gccStdenv.mkDerivation rec {
+  pname = "altermime";
   version = "0.3.11";
 
   src = fetchurl {
-    url = "https://pldaniels.com/${baseName}/${name}.tar.gz";
+    url = "https://pldaniels.com/${pname}/${pname}-${version}.tar.gz";
     sha256 = "15zxg6spcmd35r6xbidq2fgcg2nzyv1sbbqds08lzll70mqx4pj7";
   };
 
@@ -19,14 +18,14 @@ stdenv.mkDerivation rec {
   ];
 
   postPatch = ''
-    sed -i Makefile -e "s@/usr/local@$out@"
-    mkdir -p "$out/bin"
+    mkdir -p $out/bin
+    substituteInPlace Makefile --replace "/usr/local" "$out"
   '';
 
   meta = with lib; {
     description = "MIME alteration tool";
     maintainers = [ maintainers.raskin ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
     license.fullName = "alterMIME LICENSE";
     downloadPage = "https://pldaniels.com/altermime/";
   };
diff --git a/pkgs/tools/networking/dhcping/default.nix b/pkgs/tools/networking/dhcping/default.nix
index d4255d46096..f1f8cd8b5e4 100644
--- a/pkgs/tools/networking/dhcping/default.nix
+++ b/pkgs/tools/networking/dhcping/default.nix
@@ -27,6 +27,6 @@ stdenv.mkDerivation rec {
     '';
     homepage = "http://www.mavetju.org/unix/general.php";
     license = licenses.bsd2;
-    platforms = platforms.linux;
+    platforms = platforms.unix;
   };
 }
diff --git a/pkgs/tools/networking/httperf/default.nix b/pkgs/tools/networking/httperf/default.nix
index f5c888dc4bb..ea567f10d48 100644
--- a/pkgs/tools/networking/httperf/default.nix
+++ b/pkgs/tools/networking/httperf/default.nix
@@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/httperf/httperf";
     maintainers = with maintainers; [ nand0p ];
     license = licenses.gpl2;
-    platforms = platforms.linux;
+    platforms = platforms.all;
   };
 
 }