diff --git a/pkgs/by-name/ch/chawan/mancha-augment-path.diff b/pkgs/by-name/ch/chawan/mancha-augment-path.diff
index cbe4f6aed80e..5a1be54fdfa3 100644
--- a/pkgs/by-name/ch/chawan/mancha-augment-path.diff
+++ b/pkgs/by-name/ch/chawan/mancha-augment-path.diff
@@ -1,15 +1,13 @@
-Add the -m option to man's command line to augment the list of paths
-searched by man. The string "OUT" must be substituted with chawan's $out
-path after patching.
+Add the -m option to man's command line to augment the list of paths searched by man.
 The required -m option is only available in the mandoc implementation.
---- a/adapter/protocol/man
-+++ b/adapter/protocol/man
-@@ -75,7 +75,7 @@ EOF
+--- a/adapter/protocol/man.nim
++++ b/adapter/protocol/man.nim
+@@ -264,7 +264,7 @@ proc myOpen(cmd: string): tuple[ofile, efile: File] =
  
-   $section =~ s:([^-\w\200-\377.,])::g;
-   $man =~ s:([^-\w\200-\377.,])::g;
--  open(F, "GROFF_NO_SGR=1 MAN_KEEP_FORMATTING=1 $MAN $section $man 2> /dev/null |");
-+  open(F, "GROFF_NO_SGR=1 MAN_KEEP_FORMATTING=1 $MAN -m OUT/share/man $section $man 2> /dev/null |");
- }
- 
- $ok = 0;
+ proc doMan(man, keyword, section: string) =
+   let sectionOpt = if section == "": "" else: ' ' & quoteShellPosix(section)
+   let cmd = "MANCOLOR=1 GROFF_NO_SGR=1 MAN_KEEP_FORMATTING=1 " &
+-    man & sectionOpt & ' ' & quoteShellPosix(keyword)
++    man & sectionOpt & " -m @out@ " & quoteShellPosix(keyword)
+   let (ofile, efile) = myOpen(cmd)
+   if ofile == nil:
diff --git a/pkgs/by-name/ch/chawan/package.nix b/pkgs/by-name/ch/chawan/package.nix
index de47458ff974..c2c81ba5cdcc 100644
--- a/pkgs/by-name/ch/chawan/package.nix
+++ b/pkgs/by-name/ch/chawan/package.nix
@@ -7,34 +7,37 @@
 , ncurses
 , nim
 , pandoc
-, perl
 , pkg-config
 , zlib
 , unstableGitUpdater
+, libseccomp
+, substituteAll
 }:
 
 stdenv.mkDerivation {
   pname = "chawan";
-  version = "0-unstable-2024-03-01";
+  version = "0-unstable-2024-07-14";
 
   src = fetchFromSourcehut {
     owner = "~bptato";
     repo = "chawan";
-    rev = "87ba9a87be15abbe06837f1519cfb76f4bf759f3";
-    hash = "sha256-Xs+Mxe5/uoxPMf4FuelpO+bRJ1KdfASVI7rWqtboJZw=";
+    rev = "0e3d67f31df2c2d53aa0e578439852731e5f5af9";
+    hash = "sha256-eVoZisQyaebWO58a0a0KR7fwsL1kTmPX1SayqdnmSuk=";
     fetchSubmodules = true;
   };
 
   patches = [
     # Include chawan's man pages in mancha's search path
-    ./mancha-augment-path.diff
+    (substituteAll {
+      src = ./mancha-augment-path.diff;
+      out = placeholder "out";
+    })
   ];
 
   env.NIX_CFLAGS_COMPILE = toString (
     lib.optional stdenv.cc.isClang "-Wno-error=implicit-function-declaration"
   );
 
-  buildInputs = [ curlMinimal ncurses perl zlib ];
   nativeBuildInputs = [
     makeBinaryWrapper
     nim
@@ -42,10 +45,12 @@ stdenv.mkDerivation {
     pkg-config
   ];
 
-  postPatch = ''
-    substituteInPlace adapter/protocol/man \
-      --replace-fail "OUT" $out
-  '';
+  buildInputs = [
+    curlMinimal
+    libseccomp
+    ncurses
+    zlib
+  ];
 
   buildFlags = [ "all" "manpage" ];
   installFlags = [