diff --git a/pkgs/build-support/build-pecl.nix b/pkgs/build-support/build-pecl.nix
index ce948739c32..738dbb56708 100644
--- a/pkgs/build-support/build-pecl.nix
+++ b/pkgs/build-support/build-pecl.nix
@@ -22,6 +22,4 @@ stdenv.mkDerivation (args // {
   makeFlags = [ "EXTENSION_DIR=$(out)/lib/php/extensions" ] ++ makeFlags;
 
   autoreconfPhase = "phpize";
-
-  preConfigure = "touch unix.h";
 })
diff --git a/pkgs/servers/prayer/default.nix b/pkgs/servers/prayer/default.nix
index e4b457d0c17..7997d0ebcd8 100644
--- a/pkgs/servers/prayer/default.nix
+++ b/pkgs/servers/prayer/default.nix
@@ -18,6 +18,7 @@ stdenv.mkDerivation rec {
       ${ssl} \
       -e 's/CCLIENT_LIBS=.*/CCLIENT_LIBS=-lc-client/' \
       -e 's,^PREFIX .*,PREFIX='$out, \
+      -e 's,^CCLIENT_DIR=.*,CCLIENT_DIR=${uwimap}/include/c-client,' \
       Config
     sed -i -e s,/usr/bin/perl,${perl}/bin/perl, \
       templates/src/*.pl
diff --git a/pkgs/servers/uwsgi/default.nix b/pkgs/servers/uwsgi/default.nix
index d30129d93d9..921708f2fd3 100644
--- a/pkgs/servers/uwsgi/default.nix
+++ b/pkgs/servers/uwsgi/default.nix
@@ -33,7 +33,6 @@ let pythonPlugin = pkg : lib.nameValuePair "python${if pkg ? isPy2 then "2" else
                   (lib.nameValuePair "php" {
                     # usage: https://uwsgi-docs.readthedocs.io/en/latest/PHP.html#running-php-apps-with-nginx
                     path = "plugins/php";
-                    preBuild = "touch unix.h";
                     inputs = [ php-embed ] ++ php-embed.buildInputs;
                   })
                 ];
diff --git a/pkgs/tools/networking/uwimap/default.nix b/pkgs/tools/networking/uwimap/default.nix
index c2c707fbc77..7cb489a3f21 100644
--- a/pkgs/tools/networking/uwimap/default.nix
+++ b/pkgs/tools/networking/uwimap/default.nix
@@ -29,8 +29,8 @@ stdenv.mkDerivation {
     "-I${openssl.dev}/include/openssl";
 
   installPhase = ''
-    mkdir -p $out/bin $out/lib $out/include
-    cp c-client/*.h c-client/linkage.c $out/include
+    mkdir -p $out/bin $out/lib $out/include/c-client
+    cp c-client/*.h osdep/unix/*.h c-client/linkage.c c-client/auths.c $out/include/c-client/
     cp c-client/c-client.a $out/lib/libc-client.a
     cp mailutil/mailutil imapd/imapd dmail/dmail mlock/mlock mtest/mtest tmail/tmail \
       tools/{an,ua} $out/bin