ikiwiki: Fix postInstall script to work with optional dependencies

The line-continuation backslash should not be a part of optional
string because it can lead to errors like this:

    /nix/store/333six1faw9bhccsx9qw5718k6b1wiq2-stdenv-linux/setup: line 90: --prefix: command not found
    builder for '/nix/store/lb07r900fpg7r1555zpf0j8n1n7g3wlx-ikiwiki-3.20200202.3.drv' failed with exit code 127

1 files changed, 7 insertions, 7 deletions

diff --git a/pkgs/applications/misc/ikiwiki/default.nix b/pkgs/applications/misc/ikiwiki/default.nix
index 105e1d59b36..c940f824f37 100644
--- a/pkgs/applications/misc/ikiwiki/default.nix
+++ b/pkgs/applications/misc/ikiwiki/default.nix
@@ -62,13 +62,13 @@ stdenv.mkDerivation {
   postInstall = ''
     for a in "$out/bin/"*; do
       wrapProgram $a --suffix PERL5LIB : $PERL5LIB --prefix PATH : ${perlPackages.perl}/bin:$out/bin \
-      ${lib.optionalString gitSupport ''--prefix PATH : ${git}/bin \''}
-      ${lib.optionalString monotoneSupport ''--prefix PATH : ${monotone}/bin \''}
-      ${lib.optionalString bazaarSupport ''--prefix PATH : ${breezy}/bin \''}
-      ${lib.optionalString cvsSupport ''--prefix PATH : ${cvs}/bin \''}
-      ${lib.optionalString cvsSupport ''--prefix PATH : ${cvsps}/bin \''}
-      ${lib.optionalString subversionSupport ''--prefix PATH : ${subversion.out}/bin \''}
-      ${lib.optionalString mercurialSupport ''--prefix PATH : ${mercurial}/bin \''}
+      ${lib.optionalString gitSupport ''--prefix PATH : ${git}/bin ''} \
+      ${lib.optionalString monotoneSupport ''--prefix PATH : ${monotone}/bin ''} \
+      ${lib.optionalString bazaarSupport ''--prefix PATH : ${breezy}/bin ''} \
+      ${lib.optionalString cvsSupport ''--prefix PATH : ${cvs}/bin ''} \
+      ${lib.optionalString cvsSupport ''--prefix PATH : ${cvsps}/bin ''} \
+      ${lib.optionalString subversionSupport ''--prefix PATH : ${subversion.out}/bin ''} \
+      ${lib.optionalString mercurialSupport ''--prefix PATH : ${mercurial}/bin ''} \
       ${lib.concatMapStrings (x: "--prefix PATH : ${x}/bin ") extraUtils}
     done
   '';