diff --git a/pkgs/by-name/co/cowsql/37.patch b/pkgs/by-name/co/cowsql/37.patch
deleted file mode 100644
index 9f7eb84afc35..000000000000
--- a/pkgs/by-name/co/cowsql/37.patch
+++ /dev/null
@@ -1,57 +0,0 @@
-From c0d7c99632ea2ee01066988708cbb41f335cbdc3 Mon Sep 17 00:00:00 2001
-From: Brahmajit Das <listout@listout.xyz>
-Date: Sat, 14 Jun 2025 00:18:38 +0530
-Subject: [PATCH] src/lib/serialize.h: don't define double as float_t
-
-libuv with commit 85b526f makes uv.h include math.h for the definitions
-of NAN/INFINITY. That header also defines the ISO C standard float_t
-type. Now that that definition is in scope, the cowsql definition in
-src/lib/serialize.h conflicts with it.
-
-Fixes: 451cff63b29366237a9502823299b05bbff8662b
-Closes: https://github.com/cowsql/cowsql/issues/35
-Signed-off-by: Brahmajit Das <listout@listout.xyz>
----
- src/lib/serialize.h | 8 ++++----
- 1 file changed, 4 insertions(+), 4 deletions(-)
-
-diff --git a/src/lib/serialize.h b/src/lib/serialize.h
-index 9fbd49c..a7f9147 100644
---- a/src/lib/serialize.h
-+++ b/src/lib/serialize.h
-@@ -37,7 +37,7 @@ static_assert(sizeof(double) == sizeof(uint64_t),
-  * Basic type aliases to used by macro-based processing.
-  */
- typedef const char *text_t;
--typedef double float_t;
-+typedef double cowsql_float;
- typedef uv_buf_t blob_t;
- 
- /**
-@@ -143,7 +143,7 @@ COWSQL_INLINE size_t int64__sizeof(const int64_t *value)
- 	return sizeof(int64_t);
- }
- 
--COWSQL_INLINE size_t float__sizeof(const float_t *value)
-+COWSQL_INLINE size_t float__sizeof(const cowsql_float *value)
- {
- 	(void)value;
- 	return sizeof(double);
-@@ -190,7 +190,7 @@ COWSQL_INLINE void int64__encode(const int64_t *value, void **cursor)
- 	*cursor += sizeof(int64_t);
- }
- 
--COWSQL_INLINE void float__encode(const float_t *value, void **cursor)
-+COWSQL_INLINE void float__encode(const cowsql_float *value, void **cursor)
- {
- 	*(uint64_t *)(*cursor) = ByteFlipLe64(*(uint64_t *)value);
- 	*cursor += sizeof(uint64_t);
-@@ -273,7 +273,7 @@ COWSQL_INLINE int int64__decode(struct cursor *cursor, int64_t *value)
- 	return 0;
- }
- 
--COWSQL_INLINE int float__decode(struct cursor *cursor, float_t *value)
-+COWSQL_INLINE int float__decode(struct cursor *cursor, cowsql_float *value)
- {
- 	size_t n = sizeof(double);
- 	if (n > cursor->cap) {
diff --git a/pkgs/by-name/co/cowsql/package.nix b/pkgs/by-name/co/cowsql/package.nix
index f7e19e77757e..538a46889ce1 100644
--- a/pkgs/by-name/co/cowsql/package.nix
+++ b/pkgs/by-name/co/cowsql/package.nix
@@ -13,21 +13,15 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "cowsql";
-  version = "1.15.8";
+  version = "1.15.9";
 
   src = fetchFromGitHub {
     owner = "cowsql";
     repo = "cowsql";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-rwTa9owtnkyI9OpUKLk6V7WbAkqlYucpGzPnHHvKW/A=";
+    hash = "sha256-7djVcozWklI/0KhDC20df+H3YQbodUZaXBnQT4Ug8oI=";
   };
 
-  patches = [
-    # fix libuv changes. review removal in > 1.15.8
-    # https://github.com/cowsql/cowsql/pull/37
-    ./37.patch
-  ];
-
   nativeBuildInputs = [
     autoreconfHook
     pkg-config