diff --git a/pkgs/applications/graphics/ImageMagick/default.nix b/pkgs/applications/graphics/ImageMagick/default.nix
index 011e75fbc1ca..7ae24b38c01c 100644
--- a/pkgs/applications/graphics/ImageMagick/default.nix
+++ b/pkgs/applications/graphics/ImageMagick/default.nix
@@ -17,6 +17,10 @@ let
     else if stdenv.system == "x86_64-linux" || stdenv.system == "x86_64-darwin" then "x86-64"
     else throw "ImageMagick is not supported on this platform.";
 
+  mkFlag = trueStr: falseStr: cond: val: "--${if cond then trueStr else falseStr}-${val}";
+  mkWith = mkFlag "with" "without";
+  mkEnable = mkFlag "enable" "disable";
+
   hasX11 = libX11 != null && libXext != null && libXt != null;
 
 in
@@ -33,38 +37,38 @@ stdenv.mkDerivation rec {
   enableParallelBuilding = true;
 
   configureFlags = [
-    (mkEnable (libcl != null)        "opencl"      null)
-    (mkWith   true                   "modules"     null)
-    (mkWith   true                   "gcc-arch"    arch)
-    #(mkEnable true                   "hdri"        null) This breaks some dependencies
-    (mkWith   (perl != null)         "perl"        null)
-    (mkWith   (jemalloc != null)     "jemalloc"    null)
-    (mkWith   true                   "frozenpaths" null)
-    (mkWith   (bzip2 != null)        "bzlib"       null)
-    (mkWith   hasX11                 "x"           null)
-    (mkWith   (zlib != null)         "zlib"        null)
-    (mkWith   false                  "dps"         null)
-    (mkWith   (fftw != null)         "fftw"        null)
-    (mkWith   (libfpx != null)       "fpx"         null)
-    (mkWith   (djvulibre != null)    "djvu"        null)
-    (mkWith   (fontconfig != null)   "fontconfig"  null)
-    (mkWith   (freetype != null)     "freetype"    null)
-    (mkWith   (ghostscript != null)  "gslib"       null)
-    (mkWith   (graphviz != null)     "gvc"         null)
-    (mkWith   (jbigkit != null)      "jbig"        null)
-    (mkWith   (libjpeg != null)      "jpeg"        null)
-    (mkWith   (lcms2 != null)        "lcms2"       null)
-    (mkWith   false                  "lcms"        null)
-    (mkWith   (openjpeg != null)     "openjp2"     null)
-    (mkWith   (liblqr1 != null)      "lqr"         null)
-    (mkWith   (xz != null)           "lzma"        null)
-    (mkWith   (openexr != null)      "openexr"     null)
-    (mkWith   (pango != null)        "pango"       null)
-    (mkWith   (libpng != null)       "png"         null)
-    (mkWith   (librsvg != null)      "rsvg"        null)
-    (mkWith   (libtiff != null)      "tiff"        null)
-    (mkWith   (libwebp != null)      "webp"        null)
-    (mkWith   (libxml2 != null)      "xml"         null)
+    (mkEnable (libcl != null)        "opencl")
+    (mkWith   true                   "modules")
+    (mkWith   true                   "gcc-arch=${arch}")
+    #(mkEnable true                   "hdri") This breaks some dependencies
+    (mkWith   (perl != null)         "perl")
+    (mkWith   (jemalloc != null)     "jemalloc")
+    (mkWith   true                   "frozenpaths")
+    (mkWith   (bzip2 != null)        "bzlib")
+    (mkWith   hasX11                 "x")
+    (mkWith   (zlib != null)         "zlib")
+    (mkWith   false                  "dps")
+    (mkWith   (fftw != null)         "fftw")
+    (mkWith   (libfpx != null)       "fpx")
+    (mkWith   (djvulibre != null)    "djvu")
+    (mkWith   (fontconfig != null)   "fontconfig")
+    (mkWith   (freetype != null)     "freetype")
+    (mkWith   (ghostscript != null)  "gslib")
+    (mkWith   (graphviz != null)     "gvc")
+    (mkWith   (jbigkit != null)      "jbig")
+    (mkWith   (libjpeg != null)      "jpeg")
+    (mkWith   (lcms2 != null)        "lcms2")
+    (mkWith   false                  "lcms")
+    (mkWith   (openjpeg != null)     "openjp2")
+    (mkWith   (liblqr1 != null)      "lqr")
+    (mkWith   (xz != null)           "lzma")
+    (mkWith   (openexr != null)      "openexr")
+    (mkWith   (pango != null)        "pango")
+    (mkWith   (libpng != null)       "png")
+    (mkWith   (librsvg != null)      "rsvg")
+    (mkWith   (libtiff != null)      "tiff")
+    (mkWith   (libwebp != null)      "webp")
+    (mkWith   (libxml2 != null)      "xml")
   ] ++ optional (dejavu_fonts != null) "--with-dejavu-font-dir=${dejavu_fonts}/share/fonts/truetype/"
     ++ optional (ghostscript != null) "--with-gs-font-dir=${ghostscript}/share/ghostscript/fonts/";
 
diff --git a/pkgs/development/libraries/lame/default.nix b/pkgs/development/libraries/lame/default.nix
index 4a61d188ef69..562e292791ab 100644
--- a/pkgs/development/libraries/lame/default.nix
+++ b/pkgs/development/libraries/lame/default.nix
@@ -17,7 +17,7 @@ assert sndfileFileIOSupport -> (libsndfile != null);
 #assert mp3xSupport -> (analyzerHooksSupport && (gtk1 != null));
 
 let
-  sndfileFileIO = if sndfileFileIOSupport then "sndfile" else "lame";
+  mkFlag = optSet: flag: if optSet then "--enable-${flag}" else "--disable-${flag}";
 in
 
 with stdenv.lib;
@@ -39,18 +39,17 @@ stdenv.mkDerivation rec {
     ++ optional sndfileFileIOSupport libsndfile;
 
   configureFlags = [
-    (mkEnable nasmSupport          "nasm"              null)
-    (mkEnable cpmlSupport          "cpml"              null)
-    #(mkEnable efenceSupport        "efence"            null)
-    (mkWith   true                 "fileio"            sndfileFileIO)
-    (mkEnable analyzerHooksSupport "analyzer-hooks"    null)
-    (mkEnable decoderSupport       "decoder"           null)
-    (mkEnable frontendSupport      "frontend"          null)
-    (mkEnable frontendSupport      "dynamic-frontends" null)
-    #(mkEnable mp3xSupport          "mp3x"              null)
-    (mkEnable mp3rtpSupport        "mp3rtp"            null)
-  ] ++ optional debugSupport [
-    (mkEnable true                 "debug"             "alot")
+    (mkFlag nasmSupport "nasm")
+    (mkFlag cpmlSupport "cpml")
+    #(mkFlag efenceSupport "efence")
+    (if sndfileFileIOSupport then "--with-fileio=sndfile" else "--with-fileio=lame")
+    (mkFlag analyzerHooksSupport "analyzer-hooks")
+    (mkFlag decoderSupport "decoder")
+    (mkFlag frontendSupport "frontend")
+    (mkFlag frontendSupport "dynamic-frontends")
+    #(mkFlag mp3xSupport "mp3x")
+    (mkFlag mp3rtpSupport "mp3rtp")
+    (if debugSupport then "--enable-debug=alot" else "")
   ];
 
   meta = {
diff --git a/pkgs/development/libraries/libass/default.nix b/pkgs/development/libraries/libass/default.nix
index 502f95dca9a4..ab300729accf 100644
--- a/pkgs/development/libraries/libass/default.nix
+++ b/pkgs/development/libraries/libass/default.nix
@@ -11,6 +11,10 @@ assert encaSupport -> enca != null;
 assert fontconfigSupport -> fontconfig != null;
 assert harfbuzzSupport -> harfbuzz != null;
 
+let
+  mkFlag = optSet: flag: if optSet then "--enable-${flag}" else "--disable-${flag}";
+in
+
 with stdenv.lib;
 stdenv.mkDerivation rec {
   name = "libass-${version}";
@@ -22,11 +26,11 @@ stdenv.mkDerivation rec {
   };
 
   configureFlags = [
-    (mkEnable encaSupport       "enca"        null)
-    (mkEnable fontconfigSupport "fontconfig"  null)
-    (mkEnable harfbuzzSupport   "harfbuzz"    null)
-    (mkEnable rasterizerSupport "rasterizer"  null)
-    (mkEnable largeTilesSupport "large-tiles" null)
+    (mkFlag encaSupport "enca")
+    (mkFlag fontconfigSupport "fontconfig")
+    (mkFlag harfbuzzSupport "harfbuzz")
+    (mkFlag rasterizerSupport "rasterizer")
+    (mkFlag largeTilesSupport "large-tiles")
   ];
 
   nativeBuildInputs = [ pkgconfig yasm ];
diff --git a/pkgs/development/libraries/libinput/default.nix b/pkgs/development/libraries/libinput/default.nix
index 3b8b7565e779..87d8154e5aa4 100644
--- a/pkgs/development/libraries/libinput/default.nix
+++ b/pkgs/development/libraries/libinput/default.nix
@@ -9,6 +9,10 @@ assert documentationSupport -> doxygen != null && graphviz != null;
 assert eventGUISupport -> cairo != null && glib != null && gtk3 != null;
 assert testsSupport -> check != null && valgrind != null;
 
+let
+  mkFlag = optSet: flag: if optSet then "--enable-${flag}" else "--disable-${flag}";
+in
+
 with stdenv.lib;
 stdenv.mkDerivation rec {
   name = "libinput-0.15.0";
@@ -19,9 +23,9 @@ stdenv.mkDerivation rec {
   };
 
   configureFlags = [
-    (mkEnable documentationSupport "documentation" null)
-    (mkEnable eventGUISupport      "event-gui"     null)
-    (mkEnable testsSupport         "tests"         null)
+    (mkFlag documentationSupport "documentation")
+    (mkFlag eventGUISupport "event-gui")
+    (mkFlag testsSupport "tests")
   ];
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/development/libraries/libwebp/default.nix b/pkgs/development/libraries/libwebp/default.nix
index 871dff0aa8af..6da1b00ee81f 100644
--- a/pkgs/development/libraries/libwebp/default.nix
+++ b/pkgs/development/libraries/libwebp/default.nix
@@ -20,6 +20,10 @@ assert jpegSupport -> (libjpeg != null);
 assert tiffSupport -> (libtiff != null);
 assert gifSupport -> (giflib != null);
 
+let
+  mkFlag = optSet: flag: if optSet then "--enable-${flag}" else "--disable-${flag}";
+in
+
 with stdenv.lib;
 stdenv.mkDerivation rec {
   name = "libwebp-${version}";
@@ -31,19 +35,19 @@ stdenv.mkDerivation rec {
   };
 
   configureFlags = [
-    (mkEnable threadingSupport "threading" null)
-    (mkEnable openglSupport "gl" null)
-    (mkEnable pngSupport "png" null)
-    (mkEnable jpegSupport "jpeg" null)
-    (mkEnable tiffSupport "tiff" null)
-    (mkEnable gifSupport "gif" null)
-    #(mkEnable (wicSupport && stdenv.isCygwin) "wic" null)
-    (mkEnable alignedSupport "aligned" null)
-    (mkEnable swap16bitcspSupport "swap-16bit-csp" null)
-    (mkEnable experimentalSupport "experimental" null)
-    (mkEnable libwebpmuxSupport "libwebpmux" null)
-    (mkEnable libwebpdemuxSupport "libwebpdemux" null)
-    (mkEnable libwebpdecoderSupport "libwebpdecoder" null)
+    (mkFlag threadingSupport "threading")
+    (mkFlag openglSupport "gl")
+    (mkFlag pngSupport "png")
+    (mkFlag jpegSupport "jpeg")
+    (mkFlag tiffSupport "tiff")
+    (mkFlag gifSupport "gif")
+    #(mkFlag (wicSupport && stdenv.isCygwin) "wic")
+    (mkFlag alignedSupport "aligned")
+    (mkFlag swap16bitcspSupport "swap-16bit-csp")
+    (mkFlag experimentalSupport "experimental")
+    (mkFlag libwebpmuxSupport "libwebpmux")
+    (mkFlag libwebpdemuxSupport "libwebpdemux")
+    (mkFlag libwebpdecoderSupport "libwebpdecoder")
   ];
 
   buildInputs = [ ]
diff --git a/pkgs/development/libraries/stxxl/default.nix b/pkgs/development/libraries/stxxl/default.nix
index 9ebd27e82771..9fb25aa36e0a 100644
--- a/pkgs/development/libraries/stxxl/default.nix
+++ b/pkgs/development/libraries/stxxl/default.nix
@@ -2,6 +2,10 @@
 , parallel ? true
 }:
 
+let
+  mkFlag = optset: flag: if optset then "-D${flag}=ON" else "-D${flag}=OFF";
+in
+
 stdenv.mkDerivation rec {
   name = "stxxl-${version}";
   version = "1.4.1";
@@ -17,7 +21,7 @@ stdenv.mkDerivation rec {
     "-DBUILD_SHARED_LIBS=ON"
     "-DBUILD_STATIC_LIBS=OFF"
     "-DCMAKE_BUILD_TYPE=Release"
-    "-DUSE_GNU_PARALLEL=${if parallel then "ON" else "OFF"}"
+    (mkFlag parallel "USE_GNU_PARALLEL")
   ];
 
   passthru = {
diff --git a/pkgs/servers/mpd/default.nix b/pkgs/servers/mpd/default.nix
index c1611952a1e4..90dd2040e5db 100644
--- a/pkgs/servers/mpd/default.nix
+++ b/pkgs/servers/mpd/default.nix
@@ -25,13 +25,13 @@
 , opusSupport ? true, libopus
 }:
 
-with stdenv.lib;
 let
-  opt = optional;
+  opt = stdenv.lib.optional;
+  mkFlag = c: f: if c then "--enable-${f}" else "--disable-${f}";
   major = "0.19";
   minor = "9";
-in
-stdenv.mkDerivation rec {
+
+in stdenv.mkDerivation rec {
   name = "mpd-${major}.${minor}";
   src = fetchurl {
     url    = "http://www.musicpd.org/download/mpd/${major}/${name}.tar.xz";
@@ -68,33 +68,33 @@ stdenv.mkDerivation rec {
     ++ opt opusSupport libopus;
 
   configureFlags =
-    [ (mkEnable (!stdenv.isDarwin && alsaSupport) "alsa" null)
-      (mkEnable flacSupport "flac" null)
-      (mkEnable vorbisSupport "vorbis" null)
-      (mkEnable vorbisSupport "vorbis-encoder" null)
-      (mkEnable (!stdenv.isDarwin && madSupport) "mad" null)
-      (mkEnable mikmodSupport "mikmod" null)
-      (mkEnable id3tagSupport "id3" null)
-      (mkEnable shoutSupport "shout" null)
-      (mkEnable sqliteSupport "sqlite" null)
-      (mkEnable curlSupport "curl" null)
-      (mkEnable audiofileSupport "audiofile" null)
-      (mkEnable bzip2Support "bzip2" null)
-      (mkEnable ffmpegSupport "ffmpeg" null)
-      (mkEnable fluidsynthSupport "fluidsynth" null)
-      (mkEnable zipSupport "zzip" null)
-      (mkEnable samplerateSupport "lsr" null)
-      (mkEnable mmsSupport "mms" null)
-      (mkEnable mpg123Support "mpg123" null)
-      (mkEnable aacSupport "aac" null)
-      (mkEnable pulseaudioSupport "pulse" null)
-      (mkEnable jackSupport "jack" null)
-      (mkEnable stdenv.isDarwin "osx" null)
-      (mkEnable icuSupport "icu" null)
-      (mkEnable gmeSupport "gme" null)
-      (mkEnable clientSupport "libmpdclient" null)
-      (mkEnable opusSupport "opus" null)
-      (mkEnable true "debug" null)
+    [ (mkFlag (!stdenv.isDarwin && alsaSupport) "alsa")
+      (mkFlag flacSupport "flac")
+      (mkFlag vorbisSupport "vorbis")
+      (mkFlag vorbisSupport "vorbis-encoder")
+      (mkFlag (!stdenv.isDarwin && madSupport) "mad")
+      (mkFlag mikmodSupport "mikmod")
+      (mkFlag id3tagSupport "id3")
+      (mkFlag shoutSupport "shout")
+      (mkFlag sqliteSupport "sqlite")
+      (mkFlag curlSupport "curl")
+      (mkFlag audiofileSupport "audiofile")
+      (mkFlag bzip2Support "bzip2")
+      (mkFlag ffmpegSupport "ffmpeg")
+      (mkFlag fluidsynthSupport "fluidsynth")
+      (mkFlag zipSupport "zzip")
+      (mkFlag samplerateSupport "lsr")
+      (mkFlag mmsSupport "mms")
+      (mkFlag mpg123Support "mpg123")
+      (mkFlag aacSupport "aac")
+      (mkFlag pulseaudioSupport "pulse")
+      (mkFlag jackSupport "jack")
+      (mkFlag stdenv.isDarwin "osx")
+      (mkFlag icuSupport "icu")
+      (mkFlag gmeSupport "gme")
+      (mkFlag clientSupport "libmpdclient")
+      (mkFlag opusSupport "opus")
+      "--enable-debug"
     ]
     ++ opt stdenv.isLinux
       "--with-systemdsystemunitdir=$(out)/etc/systemd/system";
@@ -103,7 +103,7 @@ stdenv.mkDerivation rec {
     ${if shoutSupport then "-lshout" else ""}
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A flexible, powerful daemon for playing music";
     homepage    = http://mpd.wikia.com/wiki/Music_Player_Daemon_Wiki;
     license     = licenses.gpl2;
diff --git a/pkgs/servers/samba/4.x.nix b/pkgs/servers/samba/4.x.nix
index 6a6e2469e783..269ba2ec186f 100644
--- a/pkgs/servers/samba/4.x.nix
+++ b/pkgs/servers/samba/4.x.nix
@@ -86,7 +86,7 @@ stdenv.mkDerivation rec {
     find $out -type f -exec $SHELL -c "$SCRIPT" \;
   '';
 
-  meta = {
+  meta = with stdenv.lib; {
     homepage = http://www.samba.org/;
     description = "The standard Windows interoperability suite of programs for Linux and Unix";
     license = licenses.gpl3;
diff --git a/pkgs/tools/filesystems/ceph/generic.nix b/pkgs/tools/filesystems/ceph/generic.nix
index 5d4932e36b43..33d9b3dc64f3 100644
--- a/pkgs/tools/filesystems/ceph/generic.nix
+++ b/pkgs/tools/filesystems/ceph/generic.nix
@@ -28,6 +28,13 @@ assert cryptopp != null || (nss != null && nspr != null);
 
 with stdenv.lib;
 let
+  mkFlag = trueStr: falseStr: cond: name: val:
+    if cond == null then null else
+      "--${if cond != false then trueStr else falseStr}${name}${if val != null && cond != false then "=${val}" else ""}";
+  mkEnable = mkFlag "enable-" "disable-";
+  mkWith = mkFlag "with-" "without-";
+  mkOther = mkFlag "" "" true;
+
   hasServer = snappy != null && leveldb != null;
   hasMon = hasServer;
   hasMds = hasServer;
diff --git a/pkgs/tools/security/pinentry/default.nix b/pkgs/tools/security/pinentry/default.nix
index 3849c773a3e6..757959f53451 100644
--- a/pkgs/tools/security/pinentry/default.nix
+++ b/pkgs/tools/security/pinentry/default.nix
@@ -3,6 +3,9 @@
 }:
 
 let
+  mkFlag = pfxTrue: pfxFalse: cond: name: "--${if cond then pfxTrue else pfxFalse}-${name}";
+  mkEnable = mkFlag "enable" "disable";
+  mkWith = mkFlag "with" "without";
   hasX = gtk2 != null || qt4 != null;
 in
 with stdenv.lib;
@@ -17,12 +20,12 @@ stdenv.mkDerivation rec {
   buildInputs = [ libcap gtk2 ncurses qt4 ];
 
   configureFlags = [
-    (mkWith   (libcap != null)  "libcap"          null)
-    (mkWith   (hasX)            "x"               null)
-    (mkEnable (ncurses != null) "pinentry-curses" null)
-    (mkEnable true              "pinentry-tty"    null)
-    (mkEnable (gtk2 != null)    "pinentry-gtk2"   null)
-    (mkEnable (qt4 != null)     "pinentry-qt4"    null)
+    (mkWith   (libcap != null)  "libcap")
+    (mkWith   (hasX)            "x")
+    (mkEnable (ncurses != null) "pinentry-curses")
+    (mkEnable true              "pinentry-tty")
+    (mkEnable (gtk2 != null)    "pinentry-gtk2")
+    (mkEnable (qt4 != null)     "pinentry-qt4")
   ];
 
   nativeBuildInputs = [ pkgconfig ];
diff --git a/pkgs/tools/system/rsyslog/default.nix b/pkgs/tools/system/rsyslog/default.nix
index 195e6bc43294..a9fdcf6fa64d 100644
--- a/pkgs/tools/system/rsyslog/default.nix
+++ b/pkgs/tools/system/rsyslog/default.nix
@@ -7,6 +7,9 @@
 }:
 
 with stdenv.lib;
+let
+  mkFlag = cond: name: if cond then "--enable-${name}" else "--disable-${name}";
+in
 stdenv.mkDerivation rec {
   name = "rsyslog-8.9.0";
 
@@ -23,70 +26,70 @@ stdenv.mkDerivation rec {
   ] ++ stdenv.lib.optional stdenv.isLinux systemd;
 
   configureFlags = [
-    (mkOther                            "sysconfdir"           "/etc")
-    (mkOther                            "localstatedir"        "/var")
-    (mkWith   true                      "systemdsystemunitdir" "\${out}/etc/systemd/system")
-    (mkEnable true                      "largefile"            null)
-    (mkEnable true                      "regexp"               null)
-    (mkEnable (krb5 != null)            "gssapi-krb5"          null)
-    (mkEnable true                      "klog"                 null)
-    (mkEnable true                      "kmsg"                 null)
-    (mkEnable (systemd != null)         "imjournal"            null)
-    (mkEnable true                      "inet"                 null)
-    (mkEnable (jemalloc != null)        "jemalloc"             null)
-    (mkEnable true                      "unlimited-select"     null)
-    (mkEnable true                      "usertools"            null)
-    (mkEnable (libmysql != null)        "mysql"                null)
-    (mkEnable (postgresql != null)      "pgsql"                null)
-    (mkEnable (libdbi != null)          "libdbi"               null)
-    (mkEnable (net_snmp != null)        "snmp"                 null)
-    (mkEnable (libuuid != null)         "uuid"                 null)
-    (mkEnable (curl != null)            "elasticsearch"        null)
-    (mkEnable (gnutls != null)          "gnutls"               null)
-    (mkEnable (libgcrypt != null)       "libgcrypt"            null)
-    (mkEnable true                      "rsyslogrt"            null)
-    (mkEnable true                      "rsyslogd"             null)
-    (mkEnable true                      "mail"                 null)
-    (mkEnable (liblognorm != null)      "mmnormalize"          null)
-    (mkEnable true                      "mmjsonparse"          null)
-    (mkEnable true                      "mmaudit"              null)
-    (mkEnable true                      "mmanon"               null)
-    (mkEnable true                      "mmutf8fix"            null)
-    (mkEnable true                      "mmcount"              null)
-    (mkEnable true                      "mmsequence"           null)
-    (mkEnable true                      "mmfields"             null)
-    (mkEnable true                      "mmpstrucdata"         null)
-    (mkEnable (openssl != null)         "mmrfc5424addhmac"     null)
-    (mkEnable (librelp != null)         "relp"                 null)
-    (mkEnable (libgt != null)           "guardtime"            null)
-    (mkEnable (liblogging != null)      "liblogging-stdlog"    null)
-    (mkEnable (liblogging != null)      "rfc3195"              null)
-    (mkEnable true                      "imfile"               null)
-    (mkEnable false                     "imsolaris"            null)
-    (mkEnable true                      "imptcp"               null)
-    (mkEnable true                      "impstats"             null)
-    (mkEnable true                      "omprog"               null)
-    (mkEnable (libnet != null)          "omudpspoof"           null)
-    (mkEnable true                      "omstdout"             null)
-    (mkEnable (systemd != null)         "omjournal"            null)
-    (mkEnable true                      "pmlastmsg"            null)
-    (mkEnable true                      "pmcisconames"         null)
-    (mkEnable true                      "pmciscoios"           null)
-    (mkEnable true                      "pmaixforwardedfrom"   null)
-    (mkEnable true                      "pmsnare"              null)
-    (mkEnable true                      "omruleset"            null)
-    (mkEnable true                      "omuxsock"             null)
-    (mkEnable true                      "mmsnmptrapd"          null)
-    (mkEnable (hadoop != null)          "omhdfs"               null)
-    (mkEnable (rdkafka != null)         "omkafka"              null)
-    (mkEnable (libmongo-client != null) "ommongodb"            null)
-    (mkEnable (czmq != null)            "imzmq3"               null)
-    (mkEnable (czmq != null)            "imczmq"               null)
-    (mkEnable (czmq != null)            "omzmq3"               null)
-    (mkEnable (czmq != null)            "omczmq"               null)
-    (mkEnable (rabbitmq-c != null)      "omrabbitmq"           null)
-    (mkEnable (hiredis != null)         "omhiredis"            null)
-    (mkEnable true                      "generate-man-pages"   null)
+    "--sysconfdir=/etc"
+    "--localstatedir=/var"
+    "--with-systemdsystemunitdir=\${out}/etc/systemd/system"
+    (mkFlag true                      "largefile")
+    (mkFlag true                      "regexp")
+    (mkFlag (krb5 != null)            "gssapi-krb5")
+    (mkFlag true                      "klog")
+    (mkFlag true                      "kmsg")
+    (mkFlag (systemd != null)         "imjournal")
+    (mkFlag true                      "inet")
+    (mkFlag (jemalloc != null)        "jemalloc")
+    (mkFlag true                      "unlimited-select")
+    (mkFlag true                      "usertools")
+    (mkFlag (libmysql != null)        "mysql")
+    (mkFlag (postgresql != null)      "pgsql")
+    (mkFlag (libdbi != null)          "libdbi")
+    (mkFlag (net_snmp != null)        "snmp")
+    (mkFlag (libuuid != null)         "uuid")
+    (mkFlag (curl != null)            "elasticsearch")
+    (mkFlag (gnutls != null)          "gnutls")
+    (mkFlag (libgcrypt != null)       "libgcrypt")
+    (mkFlag true                      "rsyslogrt")
+    (mkFlag true                      "rsyslogd")
+    (mkFlag true                      "mail")
+    (mkFlag (liblognorm != null)      "mmnormalize")
+    (mkFlag true                      "mmjsonparse")
+    (mkFlag true                      "mmaudit")
+    (mkFlag true                      "mmanon")
+    (mkFlag true                      "mmutf8fix")
+    (mkFlag true                      "mmcount")
+    (mkFlag true                      "mmsequence")
+    (mkFlag true                      "mmfields")
+    (mkFlag true                      "mmpstrucdata")
+    (mkFlag (openssl != null)         "mmrfc5424addhmac")
+    (mkFlag (librelp != null)         "relp")
+    (mkFlag (libgt != null)           "guardtime")
+    (mkFlag (liblogging != null)      "liblogging-stdlog")
+    (mkFlag (liblogging != null)      "rfc3195")
+    (mkFlag true                      "imfile")
+    (mkFlag false                     "imsolaris")
+    (mkFlag true                      "imptcp")
+    (mkFlag true                      "impstats")
+    (mkFlag true                      "omprog")
+    (mkFlag (libnet != null)          "omudpspoof")
+    (mkFlag true                      "omstdout")
+    (mkFlag (systemd != null)         "omjournal")
+    (mkFlag true                      "pmlastmsg")
+    (mkFlag true                      "pmcisconames")
+    (mkFlag true                      "pmciscoios")
+    (mkFlag true                      "pmaixforwardedfrom")
+    (mkFlag true                      "pmsnare")
+    (mkFlag true                      "omruleset")
+    (mkFlag true                      "omuxsock")
+    (mkFlag true                      "mmsnmptrapd")
+    (mkFlag (hadoop != null)          "omhdfs")
+    (mkFlag (rdkafka != null)         "omkafka")
+    (mkFlag (libmongo-client != null) "ommongodb")
+    (mkFlag (czmq != null)            "imzmq3")
+    (mkFlag (czmq != null)            "imczmq")
+    (mkFlag (czmq != null)            "omzmq3")
+    (mkFlag (czmq != null)            "omczmq")
+    (mkFlag (rabbitmq-c != null)      "omrabbitmq")
+    (mkFlag (hiredis != null)         "omhiredis")
+    (mkFlag true                      "generate-man-pages")
   ];
 
   meta = {